Next Article in Journal
Quality of Colon Cancer Care in Patients Undergoing Emergency Surgery
Previous Article in Journal
Geographic and Socioeconomic Disparity of Gastric Cancer Patients in Canada
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Current Oncology
Volume 28
Issue 3
10.3390/curroncol28030191
curroncol-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles thumb_up
...
Endorse textsms
...
Comment
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Review

Interventions and Outcomes for Neoadjuvant Treatment of T4 Colon Cancer: A Scoping Review

by
Flora Jung
1,†,
Keegan Guidolin
2,†,
Michael Ho-Yan Lee
1,
Kimberley Lam-Tin-Cheung
2,
Grace Zhao
1,
Sachin Doshi
2,
Tyler Chesney
2,3,
Marina Englesakis
4,
Jelena Lukovic
5,6,
Grainne O’Kane
7,
Fayez A. Quereshy
2,8 and
Sami A. Chadi
2,8,*
1
Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
2
Department of Surgery, University of Toronto, Toronto, ON M5T1P5, Canada
3
Department of Surgery, St. Michael’s Hospital, Toronto, ON M5B 1W8, Canada
4
Library and Information Services, University Health Network, Toronto, ON M5G 2C4, Canada
5
Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, ON M5G 2C1, Canada
6
Department of Radiation Oncology, University of Toronto, Toronto, ON M5T 1P5, Canada
7
Division of Medical Oncology, Princess Margaret Cancer Centre, Toronto, ON M5G 2C1, Canada
8
Division of Surgical Oncology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 2C1, Canada
*
Author to whom correspondence should be addressed.
†
Authors contributed equally to this work.
Curr. Oncol. 2021, 28(3), 2065-2078; https://doi.org/10.3390/curroncol28030191
Submission received: 10 April 2021 / Revised: 13 May 2021 / Accepted: 24 May 2021 / Published: 29 May 2021
(This article belongs to the Section Gastrointestinal Oncology)
Browse Figures
Versions Notes

Abstract

:
While adjuvant treatment of colon cancers that penetrate the serosa (T4) have been well-established, neoadjuvant strategies have yet to be formally evaluated. Our objective was to perform a scoping review of eligibility criteria, treatment regimens, and primary outcomes for neoadjuvant approaches to T4 colon cancer. A librarian-led, systematic search of MEDLINE, Embase, Cochrane Library, Web of Science, and CINAHL up to 11 February 2020 was performed. Primary research evaluating neoadjuvant treatment in T4 colon cancer were included. Screening and data abstraction were performed in duplicate; analyses were descriptive or thematic. A total of twenty studies were included, most of which were single-arm, single-center, and retrospective. The primary objectives of the literature to date has been to evaluate treatment feasibility, tumor response, disease-free survival, and overall survival in healthy patients. Conventional XELOX and FOLFOX chemotherapy were the most commonly administered interventions. Rationale for selecting a specific regimen and for treatment eligibility criteria were poorly documented across studies. The current literature on neoadjuvant strategies for T4 colon cancer is overrepresented by single-center, retrospective studies that evaluate treatment feasibility and efficacy in healthy patients. Future studies should prioritize evaluating clear selection criteria and rationale for specific neoadjuvant strategies. Validation of outcomes in multi-center, randomized trials for XELOX and FOLFOX have the most to contribute to the growing evidence for this poorly managed disease.

1. Introduction

While 10 to 15% of patients with colon cancer are diagnosed with disease that penetrates the colonic serosa (T4), the outcomes for T4 colon cancer remain poor [1,2]. Multivisceral resection is often required to achieve negative margins in addition to adjuvant chemo- or radio-therapy for curative intent [3,4,5,6]. The three-year recurrence for patients with T4 colon cancer remains at 47% compared to 13% for those with T1-2 disease [7].
Neoadjuvant therapy is one strategy which has shown promise in improving oncologic outcomes for T4 colon cancer. It has demonstrated efficacy in gastric and rectal cancers and is postulated to contribute to the eradication of micrometastases and the reduction of cell shedding during resection [8,9,10,11,12,13,14]. The 2012 FOxTROT (fluoropyrimidine, oxaliplatin, and targeted receptor pre-operative therapy) study is the only randomized, controlled trial to date to evaluate neoadjuvant approaches to T4 colon cancer [15]. It compared neoadjuvant FOLFOX (folinic acid, 5-fluorouracil, and oxaliplatin) chemotherapy to the conventional direct-to-surgery approach in 150 patients and reported significant improvement in negative margin resection with no negative effects on postoperative morbidity [15]. Based largely on this data, the National Comprehensive Cancer Network added neoadjuvant chemotherapy as a treatment option for T4b disease in 2016; however, long-term outcome data supporting this recommendation are sparse [16]. Results from phase III of the FOxTROT trial, which evaluated 1053 patients with T3-4 colon cancer, are limited; however, their preliminary results presented in 2019 are encouraging [17]. Neoadjuvant FOLFOX is reportedly associated with tumor downstaging, pathologic complete response, near-complete tumor regression, negative margin resection, and reduced perioperative morbidity.
Given the range of possible management approaches and characteristics of T4 tumors, a detailed summary of the current literature is required to identify and advance effective strategies. Our primary objectives in this scoping review were to describe outcomes of interest, regimens, rationale, and eligibility of current neoadjuvant strategies—including chemotherapy, radiotherapy, and chemoradiotherapy—for T4 colon cancer.

2. Materials and Methods

Our review protocol was developed a priori and submitted to Open Science Framework (OSF) on 16 August 2021 (https://osf.io/q7cjd) using methods recommended by the Joanna Briggs Institute (JBI) [18] and the PRISMA-ScR extension [19].

2.1. Systematic Search of the Literature

We searched five electronic databases up to 11 February 2020: MEDLINE (OVID); EMBASE (OVID); the Cochrane Central Register of Controlled Trials (CENTRAL; via OVID); Web of Science (Clarivate); and the Cumulative Index to Nursing & Allied Health Literature (CINAHL; via EbscoHost). Our search strategy was developed and executed by a medical librarian with a specialization in general surgery research (M.E.). MeSH (Medical subject headings) and keywords were identified through an initial limited search of MEDLINE and agreed upon by the research team. The final search strategy for MEDLINE via Ovid (available in full in Table S1) was translated by M.E. to meet requirements of the remaining databases. To maximize the number of eligible studies, no restrictions for language or publication status were used. Reference lists of included studies were screened to identify any other texts of relevance.

2.2. Eligibility Criteria and Outcomes

We considered all primary research studies evaluating neoadjuvant treatment of T4 colon cancer. Studies which exclusively evaluated early stage (T1/T2/T3), metastatic, or recurrent colon cancers were excluded; studies evaluating neoadjuvant treatment of both T4 and early stage cancers were included. Studies that did not primarily aim to evaluate neoadjuvant treatment were excluded. There were no relevant exclusion criteria based on participant characteristics, including age, sex, race, culture, or comorbidity. Similarly, there were no relevant exclusion criteria based on study context, including by geographic location or healthcare setting. Our primary outcomes were treatment-selection criteria, treatment characteristics, and primary outcomes reported by each study.

2.3. Article Selection

After pilot-testing the eligibility criteria, all records were uploaded into Covidence software (www.covidence.org, accessed 10 April 2020) for the article selection process. Level 1 screening of all titles and abstracts was conducted to exclude clearly irrelevant citations. All citations were reviewed by F.J. and one other independent reviewer (M.L., S.D., G.Z., K.C.). Conflicts at this stage were resolved through automatic retention to ensure no relevant article was missed. Level 2 screening of full texts was performed similarly in duplicate for final inclusion of articles. Discrepancies at this stage were resolved by consensus; a third reviewer (K.G.) was consulted for any persisting disagreements. Reviewers were not blinded to author or journal name.

2.4. Data Extraction and Analysis

A data abstraction form was developed a priori and pilot tested. Extracted information included study characteristics (year of publication, country of origin, study design, sample size, sample source, data source, inclusion and exclusion criteria, study limitations, recommended next steps), intervention details (intervention arms, evaluated therapies, dosing and delivery specifics), and measured outcomes (primary outcomes, reported effects). A comments section was used to capture any remaining relevant information not captured by the existing a priori fields. Studies were charted in duplicate using a narrative approach, with discordance resolved through consensus. Missing data were treated as not reported. Descriptive numerical analyses through frequency analysis were performed according to study designs, sample specifics, and types of interventions. Thematic analyses were performed where appropriate to evaluate qualitative data.

3. Results

3.1. Literature Search and Selection Process

Our search identified 11,846 unique records after 4128 duplicates were removed (Figure 1). After duplicated abstract screening, 11,762 titles were identified as irrelevant, and the remaining 84 full-text articles were appraised for eligibility. Of these, 18 studies were identified from full-text screening and an additional 2 studies from reference lists; ultimately, 20 articles were included in our scoping review [15,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37]. A very small number of studies, 7 of 11,846 articles (0.06%), were irretrievable using multi-institutional search of printed material through an inter-library database and multiple requests sent to corresponding authors.

3.2. Study Characteristics

Characteristics of the included studies are detailed in Table 1. We included 13 retrospective cohort studies, 6 prospective cohort studies, and 1 randomized control trial. The majority of these (n = 15) were published between 2015 and 2020. Study sample sizes ranged from 4 to 27,575 (median (IQR) 111.5 (33.75–145.25)). Most studies were single-center trials (n = 14) with data linkage to institutional health administrative data (n = 12). Three studies originating from USA linked to the same registry (National Cancer Database); although the study periods for these overlapped, each evaluated a different neoadjuvant therapy [25,27,29].

3.3. Participant Eligibility Criteria Used in Current Literature

Participant eligibility criteria used across studies are summarized in Table S2. Conditions for inclusion were thematically categorized into eight domains, of which three were patient-specific and five were disease-specific. All studies explicitly included patients with T4 colon cancer. The next most commonly reported criteria were age ≥18 and absence of significant co-morbidity as defined by the authors.
Conditions for exclusion were similarly thematically categorized into eight domains, of which four were patient-specific, two were disease-specific, and three were intervention-specific. The most commonly reported criteria for exclusion were the presence of significant co-morbidity as defined by the authors, history of malignant disease, and age > 75.

3.4. Outcomes Assessed in Studies of Neoadjuvant Therapy

Primary outcomes used to evaluate neoadjuvant therapy are summarized in Figure 2, thematically categorized into 11 domains. Both short- and long-term postoperative outcomes of neoadjuvant therapy have been evaluated across studies with up to five years of follow-up data. The most commonly reported objective in the current neoadjuvant therapy literature is to evaluate neoadjuvant therapy safety and feasibility in addition to tumor-level responses. Cancer recurrence has been evaluated as a categorical outcome and as a time-to-event endpoint up to five years. While evaluation of local recurrence, three- and five-year disease-free survival was not uncommon, distant recurrence has only been reviewed by one study.

3.5. Neoadjuvant Treatment Regimens for T4 Colon Cancer

Chemotherapy was the most commonly evaluated neoadjuvant therapy to date (n = 11), followed by chemoradiotherapy (n = 8) and radiotherapy (n = 4) (Figure 3). Specific neoadjuvant regimens reported by included studies have been documented in Table 2. We found the most evidence for XELOX (capecitabine + oxaliplatin; n = 5) administered as oral capecitabine 1000 mg/m2 twice daily on days 1–14 + IV oxaliplatin 130 mg/m2 on day 1. The FOLFOX regimen used by the FOxTROT randomized control trial was reported as follows: oxaliplatin 85 mg/m2 + l-folinic acid 175 mg/m2 + fluorouracil 400 mg/m2; those patients with Kras wild-type cancers were sub-randomized with ± panitumumab 6mg/kg by IV bolus and 2400 mg/m2 by 46-h infusion. XELOX, FOLFOX, and panitumumab were the only chemotherapies that were evaluated by more than one study group. The remaining seven neoadjuvant chemotherapies had only single-study data.
Three studies described the role of neoadjuvant radiation therapy, which was delivered either alone or with concurrent chemotherapy. The most commonly used dose/fractionation schedules were: 45 Gy in 25 fractions, 50.4 Gy in 28 fractions, and a simultaneous boost technique delivering 46 Gy/50 Gy in 25 fractions. Radiation therapy was delivered using either 3D-CRT (3-dimensional conformal radiotherapy) or IMRT (intensity-modulated radiotherapy). CT (computerized tomography) and/or MRI (magnetic resonance imaging) was used for simulation. The primary gross tumor volume (GTV) was defined as the visible tumor and any enlarged lymph nodes on imaging and identification of gross tumor volume (GTV) [28,33,35]. For patients with locally advanced colon cancer, the clinical target volume (CTV) was defined the GTV plus a 15 to 20 mm margin with an additional 10 to 15 mm margin for the PTV to account for organ motion. No elective nodal irradiation was done. In the setting of locally advanced sigmoid colon cancer, the CTV included the GTV plus a craniocaudal expansion of 2–3 cm and adjacent lymphatic drainage regions up to L4/L5. A 6 mm PTV margin was used. Dose constraints were described by all three studies [28,33,35].

3.6. Rationale and Treatment Eligibility for Neoadjuvant Therapy

Rationale and treatment eligibility criteria for neoadjuvant therapy are summarized in Figure 4. Rationale was largely based on treatment category (i.e., chemotherapy, radiotherapy, and chemoradiotherapy), and rationale for specific regimens (e.g., FOLFOX or 45 Gy of radiation) were only defined by two studies (10%). Chemotherapy was most commonly selected for its success in achieving negative margin resection and micrometastases eradication in other cancers. Radiotherapy and chemoradiotherapy were selected for their success in achieving negative margin resection and tumor response in other cancers. Two studies identified a rationale for a specific regimen; one selected FOLFOX for its success in achieving pathologic complete response in rectal cancers [35], while the other selected FOLFOXIRI (FOLFOX + irinotecan) to test the benefit of combining three active chemotherapeutics [38].
Treatment eligibility criteria were also poorly documented across studies (n = 14) and otherwise largely based on clinical judgment. Chemotherapeutics had the most objective criteria, with some studies utilizing CT-based risk stratification and/or tumor mutational status.

3.7. Summary of Findings for Neoadjuvant Treatment for T4 Colon Cancer

Across the 20 included studies, the most commonly reported conclusion was that neoadjuvant therapy is feasible (n = 12) and effective (n = 16) (Table S3). The most commonly reported study limitations were a retrospective design (n = 11) and small sample size (n = 9). The most commonly recommended next steps were validation of outcomes in a randomized and/or prospective trial (n = 12).

4. Discussion

Our scoping review identified 20 studies on neoadjuvant treatments for T4 colon cancer. These studies largely excluded extremes of age (less than 18 years and over 75 years), significant co-morbidity, and history of other malignancy. Evaluation of safety, feasibility, and postoperative outcomes up to five years were the primary focus, particularly for XELOX and FOLFOX ± panitumumab. However, treatment eligibility and administration were poorly documented, or inconsistent within samples.
Strategies using neoadjuvant XELOX and FOLFOX for T4 colon cancers derive from established success in metastatic colon cancers, which have established tumor response rates exceeding 50% [39,40]. This is significant in the setting of T4 colon cancers, as preoperative tumor downsizing may reduce incomplete resection and local recurrence rates [7,8,41,42]. More recent strategies have incorporated EGFR (epidermal growth factor receptor)-targeted monoclonal antibodies, panitumumab and cetuximab. These achieve even higher tumor responses in metastatic colon cancers when administered with an oxaliplatin-based chemotherapy for Kras wild-type tumors; however, those with Kras mutations experience poor effectiveness, and mandated preoperative testing was introduced for treatment eligibility [43,44,45,46,47,48,49]. We identified four studies which have evaluated panitumumab and cetuximab in T4 colon cancer [15,20,34,36]. Only one of these four listed known colon cancer mutational status as a criterion for study inclusion, though all reported ascertainment of mutational status prior to administration of these antibodies [20]. The role of neoadjuvant panitumumab and cetuximab in T4 colon cancers remains unclear. No studies compared different chemotherapy strategies head-to-head.
A retrospective design was the most commonly reported study limitation in the current literature (n = 11, 55%). Authors acknowledged that the administration of neoadjuvant regimens within their selected cohort was non-standardized and subsequently lead to inconsistencies without explicit clinical reasoning [26,33,36,37]. Furthermore, almost half of the studies failed to report specifics for the treatment regimen they evaluated, such as dose and dosing interval. While the ability to regulate patient selection and interventions may be innately more challenging in retrospective design studies, the overrepresentation of such data in the current literature is concerning. To advance this literature, administration of specific neoadjuvant regimens must be standardized, and any regimens tested by future studies should be described at sufficient detail which facilitates duplication for further evaluation.
It should be highlighted that there is also concern in the current literature for bias and poorly-documented rationale in patient identification for neoadjuvant treatment; one double-arm, retrospective study of neoadjuvant radiotherapy in 131 patients acknowledged that treatment eligibility was based on an oncologist or surgeon’s judgment over explicit clinical or radiographic criteria [26]. The majority of other studies included in our review provided no rationale at all. Advancements in CT have permitted accurate identification of high-risk T4 tumors [7,15,50,51]. There has been recognition that FOLFOX and XELOX perform similarly in adjuvant data, though the same has not been replicated in neoadjuvant settings [52]. Heterogeneity in outcomes may thus be more apparent in the context of comparing chemotherapy with concurrent radiation and/or antibody use. A CT risk stratification algorithm has been proposed, through a retrospective study of 121 patients undergoing primary resection for non-metastatic colon cancer, as a robust method for identifying those who may benefit from neoadjuvant treatment based on extramural depth of the tumor; adoption of such criteria may reduce subjectivity in patient identification for neoadjuvant treatment [7]. Further evaluation of explicit selection criteria for different neoadjuvant regimens and the oncologic outcomes in patients who meet them are recommended for future studies. In addition, inclusion of more diverse outcomes, such as quality of life, should be included in future studies, as these remain poorly studied in the existing literature.
The most commonly reported next step to address existing limitations across studies was validation of outcomes in randomized or prospective trials. The aforementioned multi-center, phase III FOxTROT trial was one seeking to evaluate pathologic downstaging and recurrence in response to FOLFOX ± panitumumab; recruitment of patients with T3-4 colon cancer for this study was completed in December 2016 [15,16,17]. Another is the phase II Prodige 22-Eckinoxe trial seeking to evaluate tumor regression in response to FOLFOX ± cetuximab in patients similarly with T3-4 colon cancer; estimated completion date of recruitment for this study remains February 2021 [53]. Results from these and other planned, randomized trials of neoadjuvant therapies are awaited to further the current level of evidence; to corroborate existing data from single-arm and retrospective studies, evaluation of XELOX or radiotherapy in a randomized trial may also be beneficial.
The conclusions of our review have limitations. Our team decided by consensus to exclude studies which had a primary aim of evaluating adjuvant treatment in patients with T4 colon cancer, although these studies may also include those who received prior neoadjuvant treatment. This decision was based on pilot testing of our eligibility criteria, which found a lack of patients and outcomes of interest reported by such articles. We mitigated the potential impact of this decision through performance of extensive full-text reviews with four independent members of our team and are reassured that this did not significantly affect our collection of relevant outcomes in the literature. Secondly, scoping reviews are based on categorization of articles and thematic classification of schemes by nature and thus are subject to the innate limitations of descriptive analyses. We mitigated potential for subjectivity through a predefined, pilot-tested data extraction sheet and duplicated abstractions.

5. Conclusions

Literature to date on neoadjuvant strategies for T4 colon cancer has evaluated feasibility, tumor response, and survival in healthy patients. Clear selection criteria for different neoadjuvant strategies in T4 colon cancer have not been defined or evaluated, and we strongly recommend future studies to prioritize this in order to optimize treatment for patients who may benefit and avoid overtreatment of those who would not. Large, multi-center, randomized trials which further assess this for FOLFOX and XELOX will have the most to contribute.

Supplementary Materials

The following are available online at https://www.mdpi.com/article/10.3390/curroncol28030191/s1, Table S1: Full search strategy for Ovid MEDLINE® 1946 to 10 February 2020; Table S2: Distribution of inclusion and exclusion criteria for study participant eligibility; Table S3: Summary of conclusions from included studies.

Author Contributions

Conceptualization: F.J., F.A.Q., and S.A.C.; methodology: F.J., M.E., T.C., J.L., G.O., F.A.Q., and S.A.C.; data collection: F.J., K.G., M.H.-Y.L., K.L.-T.-C., G.Z., and S.D.; analysis: F.J. and S.A.C.; original draft preparation: F.J.; writing, reviewing, and editing: K.G., M.H.-Y.L., K.L.-T.-C., G.Z., S.D., T.C., M.E., J.L., G.O., F.A.Q., and S.A.C. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.

Conflicts of Interest

The authors declare no conflict of interest.

References

  1. Gunderson, L.L.; Jessup, J.M.; Sargent, D.J.; Greene, F.L.; Stewart, A.K. Revised TN Categorization for Colon Cancer Based on National Survival Outcomes Data. J. Clin. Oncol. 2010, 28, 264–271. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  2. Klaver, C.E.L.; Gietelink, L.; Bemelman, W.A.; Wouters, M.W.J.M.; Wiggers, T.; Tollenaar, R.A.E.M.; Tanis, P.J.; on behalf of the Dutch Surgical Colorectal Audit group. Locally Advanced Colon Cancer: Evaluation of Current Clinical Practice and Treatment Outcomes at the Population Level. J. Natl. Compr. Cancer Netw. 2017, 15, 181–190. [Google Scholar] [CrossRef] [Green Version]
  3. Croner, R.S.; Merkel, S.; Papadopoulos, T.; Schellerer, V.; Hohenberger, W.; Goehl, J. Multivisceral Resection for Colon Carcinoma. Dis. Colon Rectum 2009, 52, 1381–1386. [Google Scholar] [CrossRef] [PubMed]
  4. Govindarajan, A.; Coburn, N.G.; Kiss, A.; Rabeneck, L.; Smith, A.J.; Law, C.H.L. Population-Based Assessment of the Surgical Management of Locally Advanced Colorectal Cancer. J. Natl. Cancer Inst. 2006, 98, 1474–1481. [Google Scholar] [CrossRef]
  5. Nakafusa, Y.; Tanaka, T.; Tanaka, M.; Kitajima, Y.; Sato, S.; Miyazaki, K. Comparison of Multivisceral Resection and Standard Operation for Locally Advanced Colorectal Cancer: Analysis of Prognostic Factors for Short-Term and Long-Term Outcome. Dis. Colon Rectum 2004, 47, 2055–2063. [Google Scholar] [CrossRef] [PubMed]
  6. Taylor, W.E.; Donohue, J.H.; Gunderson, L.L.; Nelson, H.; Nagorney, D.M.; Devine, R.M.; Haddock, M.G.; Larson, D.R.; Rubin, J.; O’Connell, M.J. The mayo clinic experience with multimodality treatment of locally advanced or recurrent colon cancer. Ann. Surg. Oncol. 2002, 9, 177–185. [Google Scholar] [CrossRef] [PubMed]
  7. Smith, N.J.; Bees, N.; Barbachano, Y.; Norman, A.R.; Swift, R.I.; Brown, G. Preoperative computed tomography staging of nonmetastatic colon cancer predicts outcome: Implications for clinical trials. Br. J. Cancer 2007, 96, 1030–1036. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  8. Cunningham, D.; Allum, W.H.; Stenning, S.P.; Thompson, J.N.; Van De Velde, C.J.; Nicolson, M.; Scarffe, J.H.; Lofts, F.J.; Falk, S.J.; Iveson, T.J.; et al. Perioperative Chemotherapy versus Surgery Alone for Resectable Gastroesophageal Cancer. N. Engl. J. Med. 2006, 355, 11–20. [Google Scholar] [CrossRef] [Green Version]
  9. Sebag-Montefiore, D.; Stephens, R.J.; Steele, R.; Monson, J.; Grieve, R.; Khanna, S.; Quirke, P.; Couture, J.; de Metz, C.; Myint, A.S.; et al. Preoperative radiotherapy versus selective postoperative chemoradiotherapy in patients with rectal cancer (MRC CR07 and NCIC-CTG C016): A multicentre, randomised trial. Lancet 2009, 373, 811–820. [Google Scholar] [CrossRef] [Green Version]
  10. Finlay, I.G.; Meek, D.; Bruntont, F.; McArdle, C.S. Growth rate of hepatic metastases in colorectal carcinoma. BJS 2005, 75, 641–644. [Google Scholar] [CrossRef] [PubMed]
  11. Tanaka, K.; Shimada, H.; Miura, M.; Fujii, Y.; Yamaguchi, S.; Endo, I.; Sekido, H.; Togo, S.; Ike, H. Metastatic Tumor Doubling Time: Most Important Prehepatectomy Predictor of Survival and Nonrecurrence of Hepatic Colorectal Cancer Metastasis. World J. Surg. 2004, 28, 263–270. [Google Scholar] [CrossRef] [PubMed]
  12. Zeamari, S.; Roos, E.; Stewart, F. Tumour seeding in peritoneal wound sites in relation to growth-factor expression in early granulation tissue. Eur. J. Cancer 2004, 40, 1431–1440. [Google Scholar] [CrossRef]
  13. Fahmy, R.G.; Dass, C.R.; Sun, L.-Q.; Chesterman, C.N.; Khachigian, L.M. Transcription factor Egr-1 supports FGF-dependent angiogenesis during neovascularization and tumor growth. Nat. Med. 2003, 9, 1026–1032. [Google Scholar] [CrossRef]
  14. Schelfhout, V.R.; Coene, E.D.; Delaey, B.; Waeytens, A.A.; De Rycke, L.; Deleu, M.; De Potter, C.R. The role of heregulin-? as a motility factor and amphiregulin as a growth factor in wound healing. J. Pathol. 2002, 198, 523–533. [Google Scholar] [CrossRef]
  15. FOxTROT Collaborative Group. Feasibility of preoperative chemotherapy for locally advanced, operable colon cancer: The pilot phase of a randomised controlled trial. Lancet Oncol. 2012, 13, 1152–1160. [Google Scholar] [CrossRef] [Green Version]
  16. NCCN. NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) Colon Cancer; National Comprehensive Cancer Network: Plymouth Meeting, PA, USA, 2016. [Google Scholar]
  17. Morton, D. FOxTROT: An international randomised controlled trial in 1053 patients evaluating neoadjuvant chemotherapy (NAC) for colon cancer. On behalf of the FOxTROT Collaborative Group. Ann. Oncol. 2019, 30, v198. [Google Scholar] [CrossRef]
  18. Peters, M.; Godfrey, C.; McInerney, P.; Munn, Z.; Tricco, A.; Khalil, H. Chapter 11: Scoping reviews. JBI Reviewer’s Man. 2019. [Google Scholar] [CrossRef]
  19. Tricco, A.C.; Lillie, E.; Zarin, W.; O’Brien, K.K.; Colquhoun, H.; Levac, D.; Moher, D.; Peters, M.D.; Horsley, T.; Weeks, L.; et al. PRISMA extension for scoping reviews (PRISMA-ScR): Checklist and explanation. Ann. Intern. Med. 2018, 169, 467–473. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  20. Jakobsen, A.; Andersen, F.; Fischer, A.; Jensen, L.H.; Jørgensen, J.C.R.; Larsen, O.; Lindebjerg, J.; Pløen, J.; Rafaelsen, S.R.; Vilandt, J. Neoadjuvant chemotherapy in locally advanced colon cancer.A phase II trial. Acta Oncol. 2015, 54, 1747–1753. [Google Scholar] [CrossRef] [PubMed]
  21. Arredondo, J.; González, I.; Baixauli, J.; Martínez, P.; Rodríguez, J.; Pastor, C.; Ribelles, M.J.; Sola, J.J.; Hernández-Lizoain, J.L. Tumor response assessment in locally advanced colon cancer after neoadjuvant chemotherapy. J. Gastrointest. Oncol. 2014, 5, 104–111. [Google Scholar] [PubMed]
  22. Chang, H.; Yu, X.; Xiao, W.-W.; Wang, Q.-X.; Zhou, W.-H.; Zeng, Z.-F.; Ding, P.-R.; Li, L.-R.; Gao, Y.-H. Neoadjuvant chemoradiotherapy followed by surgery in patients with unresectable locally advanced colon cancer: A prospective observational study. OncoTargets Ther. 2018, 11, 409–418. [Google Scholar] [CrossRef] [Green Version]
  23. Zhou, H.; Department of Colorectal Surgery; Song, Y.; Jiang, J.; Niu, H.; Zhao, H.; Liang, J.; Su, H.; Wang, Z.; Zhou, Z.; et al. A pilot phase II study of neoadjuvant triplet chemotherapy regimen in patients with locally advanced resectable colon cancer. Chin. J. Cancer Res. 2016, 28, 598–605. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  24. Liu, F.; Yang, L.; Wu, Y.; Li, C.; Zhao, J.; Keranmu, A.; Zheng, H.; Huang, D.; Wang, L.; Tong, T.; et al. CapOX as neoadjuvant chemotherapy for locally advanced operable colon cancer patients: A prospective single-arm phase II trial. Chin. J. Cancer Res. 2016, 28, 589–597. [Google Scholar] [CrossRef] [Green Version]
  25. Dehal, A.; Graff-Baker, A.N.; Vuong, B.; Fischer, T.; Klempner, S.J.; Chang, S.-C.; Grunkemeier, G.L.; Bilchik, A.J.; Goldfarb, M. Neoadjuvant Chemotherapy Improves Survival in Patients with Clinical T4b Colon Cancer. J. Gastrointest. Surg. 2018, 22, 242–249. [Google Scholar] [CrossRef] [PubMed]
  26. Krishnamurty, D.M.; Hawkins, A.; Wells, K.O.; Mutch, M.G.; Silviera, M.L.; Glasgow, S.C.; Hunt, S.R.; Dharmarajan, S. Neoadjuvant Radiation Therapy in Locally Advanced Colon Cancer: A Cohort Analysis. J. Gastrointest. Surg. 2018, 22, 906–912. [Google Scholar] [CrossRef] [PubMed]
  27. Hawkins, A.T.; Ford, M.M.; Geiger, T.M.; Hopkins, M.B.; Kachnic, L.A.; Muldoon, R.L.; Glasgow, S.C. Neoadjuvant radiation for clinical T4 colon cancer: A potential improvement to overall survival. Surgery 2019, 165, 469–475. [Google Scholar] [CrossRef] [PubMed]
  28. Zhou, J.; Guo, Z.; Yu, W.; Li, S.; Qiao, W. Clinical Evaluation of Preoperative Radiotherapy Combined with FOLFOX Chemotherapy on Patients with Locally Advanced Colon Cancer. Am. Surg. 2019, 85, 313–320. [Google Scholar] [CrossRef] [PubMed]
  29. Salami, A.C.; Obaid, T.; Nweze, N.J.; DeLeon, M.; Force, L.; Gorgun, E.; Wexner, S.; Joshi, A.R. Neoadjuvant chemoradiation versus adjuvant chemotherapy for locally advanced adenocarcinoma of the rectosigmoid junction. Color. Dis. 2019, 22, 513–520. [Google Scholar] [CrossRef]
  30. Manilich, E.A.; Kiran, R.P.; Radivoyevitch, T.; Lavery, I.; Fazio, V.W.; Remzi, F.H. A Novel Data-Driven Prognostic Model for Staging of Colorectal Cancer. J. Am. Coll. Surg. 2011, 213, 579–588.e2. [Google Scholar] [CrossRef]
  31. Hyngstrom, J.R.; Tzeng, C.-W.D.; Beddar, S.; Das, M.P.; Krishnan, S.; Delclos, M.E.; Crane, C.H.; Chang, G.J.; You, Y.N.; Feig, B.W.; et al. Intraoperative radiation therapy for locally advanced primary and recurrent colorectal cancer: Ten-year institutional experience. J. Surg. Oncol. 2014, 109, 652–658. [Google Scholar] [CrossRef]
  32. Cukier, M.; Smith, A.; Milot, L.; Chu, W.; Chung, H.; Fenech, D.; Herschorn, S.; Ko, Y.; Rowsell, C.; Soliman, H.; et al. Neoadjuvant chemoradiotherapy and multivisceral resection for primary locally advanced adherent colon cancer: A single institution experience. Eur. J. Surg. Oncol. (EJSO) 2012, 38, 677–682. [Google Scholar] [CrossRef]
  33. Qiu, B.; Ding, P.-R.; Cai, L.; Xiao, W.-W.; Zeng, Z.-F.; Chen, G.; Lu, Z.-H.; Li, L.-R.; Wu, X.-J.; Mirimanoff, R.-O.; et al. Outcomes of preoperative chemoradiotherapy followed by surgery in patients with unresectable locally advanced sigmoid colon cancer. Chin. J. Cancer 2016, 35, 65. [Google Scholar] [CrossRef] [Green Version]
  34. Hansen, T.F.; Kjær-Frifeldt, S.; Lindebjerg, J.; Rafaelsen, S.R.; Jensen, L.H.; Jakobsen, A.; Sørensen, F.B. Tumor–stroma ratio predicts recurrence in patients with colon cancer treated with neoadjuvant chemotherapy. Acta Oncol. 2017, 57, 528–533. [Google Scholar] [CrossRef] [PubMed]
  35. Huang, C.-M.; Huang, M.-Y.; Ma, C.-J.; Yeh, Y.–S.; Tsai, H.-L.; Huang, C.-W.; Huang, C.-J.; Wang, J.-Y. Neoadjuvant FOLFOX chemotherapy combined with radiotherapy followed by radical resection in patients with locally advanced colon cancer. Radiat. Oncol. 2017, 12, 48. [Google Scholar] [CrossRef] [Green Version]
  36. Li, Y.J.; Wu, Y.L.; Cui, J.; Zhang, L.; Zheng, W.; Zhu, Y.L.; Yang, L.; Zhang, H.Z. The efficacy and safety of surgical treatment after neoadjuvant chemotherapy for cT4N+ colon cancer. Zhonghua Zhong Liu Za Zhi Oncol. 2019, 41, 454–459. (In Chinese) [Google Scholar]
  37. Arredondo, J.; Baixauli, J.; Pastor, C.; Chopitea, A.; Sola, J.J.; González, I.; A-Cienfuegos, J.; Martínez, P.; Rodriguez, J.; Hernández-Lizoain, J.L. Mid-term oncologic outcome of a novel approach for locally advanced colon cancer with neoadjuvant chemotherapy and surgery. Clin. Transl. Oncol. 2016, 19, 379–385. [Google Scholar] [CrossRef] [PubMed]
  38. Nishikawa, T.; Ishihara, S.; Emoto, S.; Kaneko, M.; Murono, K.; Sasaki, K.; Otani, K.; Tanaka, T.; Kiyomatsu, T.; Hata, K.; et al. Multivisceral resections for locally advanced colorectal cancer after preoperative treatment. Mol. Clin. Oncol. 2018, 8, 493–498. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  39. Seymour, M.T.; Maughan, T.S.; Ledermann, J.A.; Topham, C.; James, R.; Gwyther, S.J.; Smith, D.B.; Shepherd, S.; Maraveyas, A.; Ferry, D.R.; et al. Different strategies of sequential and combination chemotherapy for patients with poor prognosis advanced colorectal cancer (MRC FOCUS): A randomised controlled trial. Lancet 2007, 370, 143–152. [Google Scholar] [CrossRef]
  40. Maughan, T.S.; Adams, R.; Smith, C.G.; Meade, A.M.; Seymour, M.T.; Wilson, R.H.; Idziaszczyk, S.; Harris, R.; Fisher, D.; Kenny, S.L.; et al. Addition of cetuximab to oxaliplatin-based first-line combination chemotherapy for treatment of advanced colorectal cancer: Results of the randomised phase 3 MRC COIN trial. Lancet 2011, 377, 2103–2114. [Google Scholar] [CrossRef] [Green Version]
  41. Kapiteijn, E.; Marijnen, C.A.; Nagtegaal, I.; Putter, H.; Steup, W.H.; Wiggers, T.; Rutten, H.J.; Pahlman, L.; Glimelius, B.; Van Krieken, J.H.J.; et al. Preoperative Radiotherapy Combined with Total Mesorectal Excision for Resectable Rectal Cancer. N. Engl. J. Med. 2001, 345, 638–646. [Google Scholar] [CrossRef] [Green Version]
  42. Quirke, P.; Dixon, M.; Durdey, P.; Williams, N. Local recurrence of rectal adenocarcinoma due to inadequate surgical resection. Lancet 1986, 328, 996–999. [Google Scholar] [CrossRef]
  43. Van Cutsem, E.; Köhne, C.-H.; Hitre, E.; Zaluski, J.; Chien, C.-R.C.; Makhson, A.; D’Haens, G.; Pintér, T.; Lim, R.; Bodoky, G.; et al. Cetuximab and Chemotherapy as Initial Treatment for Metastatic Colorectal Cancer. N. Engl. J. Med. 2009, 360, 1408–1417. [Google Scholar] [CrossRef] [Green Version]
  44. Bokemeyer, C.; Bondarenko, I.; Makhson, A.; Hartmann, J.T.; Aparicio, J.; De Braud, F.; Donea, S.; Ludwig, H.; Schuch, G.; Stroh, C.; et al. Fluorouracil, Leucovorin, and Oxaliplatin With and Without Cetuximab in the First-Line Treatment of Metastatic Colorectal Cancer. J. Clin. Oncol. 2009, 27, 663–671. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  45. Douillard, J.-Y.; Siena, S.; Cassidy, J.; Tabernero, J.; Burkes, R.; Barugel, M.; Humblet, Y.; Bodoky, G.; Cunningham, D.; Jassem, J.; et al. Randomized, Phase III Trial of Panitumumab with Infusional Fluorouracil, Leucovorin, and Oxaliplatin (FOLFOX4) Versus FOLFOX4 Alone As First-Line Treatment in Patients With Previously Untreated Metastatic Colorectal Cancer: The PRIME Study. J. Clin. Oncol. 2010, 28, 4697–4705. [Google Scholar] [CrossRef]
  46. Hecht, J.R.; Mitchell, E.; Chidiac, T.; Scroggin, C.; Hagenstad, C.; Spigel, D.; Marshall, J.; Cohn, A.; Mccollum, D.; Stella, P.; et al. A Randomized Phase IIIB Trial of Chemotherapy, Bevacizumab, and Panitumumab Compared With Chemotherapy and Bevacizumab Alone for Metastatic Colorectal Cancer. J. Clin. Oncol. 2009, 27, 672–680. [Google Scholar] [CrossRef] [Green Version]
  47. Tol, J.; Koopman, M.; Cats, A.; Rodenburg, C.J.; Creemers, G.J.M.; Schrama, J.G.; Erdkamp, F.L.G.; Vos, A.H.; Van Groeningen, C.J.; Sinnige, H.A.M.; et al. Chemotherapy, Bevacizumab, and Cetuximab in Metastatic Colorectal Cancer. N. Engl. J. Med. 2009, 360, 563–572. [Google Scholar] [CrossRef] [Green Version]
  48. Borner, M.; Koeberle, D.; Von Moos, R.; Saletti, P.; Rauch, D.; Hess, V.; Trojan, A.; Helbling, D.; Pestalozzi, B.; Caspar, C.; et al. Adding cetuximab to capecitabine plus oxaliplatin (XELOX) in first-line treatment of metastatic colorectal cancer: A randomized phase II trial of the Swiss Group for Clinical Cancer Research SAKK. Ann. Oncol. 2008, 19, 1288–1292. [Google Scholar] [CrossRef]
  49. Tveit, K.M.; Guren, T.; Glimelius, B.; Pfeiffer, P.; Sorbye, H.; Pyrhonen, S.; Sigurdsson, F.; Kure, E.; Ikdahl, T.; Skovlund, E.; et al. Phase III Trial of Cetuximab With Continuous or Intermittent Fluorouracil, Leucovorin, and Oxaliplatin (Nordic FLOX) Versus FLOX Alone in First-Line Treatment of Metastatic Colorectal Cancer: The NORDIC-VII Study. J. Clin. Oncol. 2012, 30, 1755–1762. [Google Scholar] [CrossRef]
  50. Dighe, S.; Blake, H.; Koh, M.; Swift, I.; Arnaout, A.; Temple, L.; Barbachano, Y.; Brown, G. Accuracy of multidetector computed tomography in identifying poor prognostic factors in colonic cancer. BJS 2010, 97, 1407–1415. [Google Scholar] [CrossRef]
  51. Dighe, S.; Swift, I.; Magill, L.; Handley, K.; Gray, R.; Quirke, P.; Morton, D.; Seymour, M.; Warren, B.; Brown, G. Accuracy of radiological staging in identifying high-risk colon cancer patients suitable for neoadjuvant chemotherapy: A multicentre experience. Color. Dis. 2011, 14, 438–444. [Google Scholar] [CrossRef] [PubMed]
  52. Cassidy, J.; Schmoll, H.; Chu, E.; Hawkins, N.; Tatt, I.; Saini, J.P.; Urspruch, A. Comparative clinical efficacy of adjuvant chemotherapy regimens in randomized controlled trials (RCTs) of early-stage colon cancer: Systematic review and meta-analysis. J. Clin. Oncol. 2011, 29, 498. [Google Scholar] [CrossRef]
  53. Karoui, M.; Rullier, A.; Luciani, A.; Bonnetain, F.; Auriault, M.-L.; Sarran, A.; Monges, G.; Trillaud, H.; Le Malicot, K.; Leroy, K.; et al. Neoadjuvant FOLFOX 4 versus FOLFOX 4 with Cetuximab versus immediate surgery for high-risk stage II and III colon cancers: A multicentre randomised controlled phase II trial--the PRODIGE 22--ECKINOXE trial. BMC Cancer 2015, 15, 511. [Google Scholar] [CrossRef] [PubMed] [Green Version]
Curroncol 28 00191 g001 550
Figure 1. Article selection.
Figure 1. Article selection.
Curroncol 28 00191 g001
Curroncol 28 00191 g002 550
Figure 2. Heatmap graphic showing the distribution of primary outcomes in the current literature on neoadjuvant therapy for T4 colon cancer. Each box in the grid represents the number of studies (color coded per the legend) that use the primary outcome listed on the y-axis to evaluate the neoadjuvant therapy listed on the x-axis. NAT, neoadjuvant therapy; R0, microscopically negative margins; DFS, disease-free survival; OS, overall survival.
Figure 2. Heatmap graphic showing the distribution of primary outcomes in the current literature on neoadjuvant therapy for T4 colon cancer. Each box in the grid represents the number of studies (color coded per the legend) that use the primary outcome listed on the y-axis to evaluate the neoadjuvant therapy listed on the x-axis. NAT, neoadjuvant therapy; R0, microscopically negative margins; DFS, disease-free survival; OS, overall survival.
Curroncol 28 00191 g002
Curroncol 28 00191 g003 550
Figure 3. Neoadjuvant therapies in the current literature. (Categories are not mutually exclusive. Some trials evaluated more than one neoadjuvant therapy). DTS, direct-to-surgery; CRT, chemoradiotherapy; FOLFOX, folinic acid + 5-fluorouracil + oxaliplatin; FOLFOXIRI, FOLFOX + irinotecan; mFOLFIRI: 5-fluorouracil + irinotecan; XELOX, capecitabine + oxaliplatin; XELOXIRI, XELOX + irinotecan; XELIRI, capecitabine + irinotecan; NAC, neoadjuvant chemotherapy; NAR, neoadjuvant radiotherapy.
Figure 3. Neoadjuvant therapies in the current literature. (Categories are not mutually exclusive. Some trials evaluated more than one neoadjuvant therapy). DTS, direct-to-surgery; CRT, chemoradiotherapy; FOLFOX, folinic acid + 5-fluorouracil + oxaliplatin; FOLFOXIRI, FOLFOX + irinotecan; mFOLFIRI: 5-fluorouracil + irinotecan; XELOX, capecitabine + oxaliplatin; XELOXIRI, XELOX + irinotecan; XELIRI, capecitabine + irinotecan; NAC, neoadjuvant chemotherapy; NAR, neoadjuvant radiotherapy.
Curroncol 28 00191 g003
Curroncol 28 00191 g004 550
Figure 4. Heatmap graphics showing the rationale (A) and eligibility criteria (B) for neoadjuvant therapy for T4 colon cancer. Each box in the grid represents the number of studies (color coded per the legend) that use the rationale (A) or eligibility criteria (B) listed on the y-axis, corresponding to the neoadjuvant therapy listed on the x-axis. (Categories are not mutually exclusive). NAT, neoadjuvant therapy; CRC, colorectal cancer; R0, microscopically negative margins; AC, adjuvant chemotherapy; CT, computed tomography.
Figure 4. Heatmap graphics showing the rationale (A) and eligibility criteria (B) for neoadjuvant therapy for T4 colon cancer. Each box in the grid represents the number of studies (color coded per the legend) that use the rationale (A) or eligibility criteria (B) listed on the y-axis, corresponding to the neoadjuvant therapy listed on the x-axis. (Categories are not mutually exclusive). NAT, neoadjuvant therapy; CRC, colorectal cancer; R0, microscopically negative margins; AC, adjuvant chemotherapy; CT, computed tomography.
Curroncol 28 00191 g004
Table
Table 1. Selected study characteristics of included articles (n = 20).
Table 1. Selected study characteristics of included articles (n = 20).
Study CharacteristicNo. (%)
Year published
2011–20145 (25)
2015–201915 (75)
Country of origin
USA6 (30)
Canada1 (5)
UK1 (5)
Denmark2 (10)
Spain2 (10)
China6 (30)
Taiwan1 (5)
Japan1 (5)
Design
Randomized control trial 1 (5)
Retrospective cohort13 (65)
Prospective cohort6 (30)
Comparative arm
Yes6 (30)
No14 (70)
Sample source
Single-center14 (70)
Multi-center4 (20)
Not stated2 (10)
Data source
Institutional data12 (60)
National Cancer Database3 (15)
Cleveland Clinic colorectal cancer registry1 (5)
Colorectal Carcinoma Database1 (5)
Not stated3 (15)
Table
Table 2. Neoadjuvant regimens as detailed by included studies.
Table 2. Neoadjuvant regimens as detailed by included studies.
Treatment Regimen [ref]Duration (Weeks)Dose Interval
(Weeks)
Direct-to-Surgery [15,25,26,27,28]
Chemotherapy
FOLFOX
  • Oxaliplatin 85 mg/m2 + l-folinic acid 175 mg/m2 + fluorouracil 400 mg/m2, then ± panitumumab 6 mg/kg by IV bolus and 2400 mg/m2 by 46 h infusion [15]
62
  No dosing details described [37]
FOLFOXIRI
  • 1 h infusion of irinotecan 150 mg/m2 on day 1, then 120 min infusion of oxaliplatin 85 mg/m2 + l-folinic acid 200 mg/m2 on day 2, then 5-fluorouracil 500 mg IV bolus and 2400 mg/m2 by 44 h infusion or S-1 40–60 mg orally BID for 10 days or capecitabine 1000 mg/m2 orally BID for 10 days [23]
-2
mFOLFIRI [36]
XELOX
  • Capecitabine 1000 mg/m2 orally BID on days 1–14 + oxaliplatin 130 mg/m2 by IV on day 1 ± panitumumab 9 mg/kg IV [20,24,34]
93
  No dosing details described [20,21,24,34,36]
XELOXIRI, no dosing details described [36]
XELIRI, no dosing details described [36]
Cetuximab, no dosing details described [36]
Bevacizumab, no dosing details described [36]
Recombinant human endostatin, no dosing details described [36]
Not specified [25,30,38]
Radiation
External beam radiation, 45–50 Gy/25 fractions [26,27,31] 5-
Not specified [38]
Chemoradiation
External beam radiation, 45–50 Gy/25 fractions with
  FOLFOX
   Oxaliplatin 85 mg/m2 + l-folinic acid 400 mg/m2 by IV bolus, then 46 h infusion of 5-fluorouracil 2800 mg/m2 [35]		-2
   Oxaliplatin 80 mg/m2 + l-folinic acid 300 mg/m2/d on day 1–5 + 5-fulorouracil 400 mg/m2/d on day 1–4 [28] 3-
   No dosing details described [26]
  5-FU
    5-fluorouracil 225 mg/m2/day + 45–50 Gy, 25 fractions [32]
    No dosing details described [38] 		--
  XELOX
    Capecitabine 1000 mg/m2 orally BID on days 1–14 ±
    oxaliplatin 100 mg/m2 on day 1 [22] 		--
  Capecitabine only, no dosing details described [22]
  mFOLFOX or FOLFOXIRI or XELOX, no dosing details
  described [33] 		105
Not specified [29]
Categories are not mutually exclusive. Some trials evaluated more than one neoadjuvant therapy; -: not reported; FOLFOX, folinic acid + 5-fluorouracil + oxaliplatin; FOLFOXIRI, FOLFOX + irinotecan; mFOLFIRI, 5-fluorouracil + irinotecan; XELOX, capecitabine + oxaliplatin; XELOXIRI, XELROX + irinotecan; XELIRI, capecitabine + irinotecan; NAC, neoadjuvant chemotherapy; NAR, neoadjuvant radiotherapy.
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Share and Cite

MDPI and ACS Style

Jung, F.; Guidolin, K.; Lee, M.H.-Y.; Lam-Tin-Cheung, K.; Zhao, G.; Doshi, S.; Chesney, T.; Englesakis, M.; Lukovic, J.; O’Kane, G.; et al. Interventions and Outcomes for Neoadjuvant Treatment of T4 Colon Cancer: A Scoping Review. Curr. Oncol. 2021, 28, 2065-2078. https://doi.org/10.3390/curroncol28030191

AMA Style

Jung F, Guidolin K, Lee MH-Y, Lam-Tin-Cheung K, Zhao G, Doshi S, Chesney T, Englesakis M, Lukovic J, O’Kane G, et al. Interventions and Outcomes for Neoadjuvant Treatment of T4 Colon Cancer: A Scoping Review. Current Oncology. 2021; 28(3):2065-2078. https://doi.org/10.3390/curroncol28030191

Chicago/Turabian Style

Jung, Flora, Keegan Guidolin, Michael Ho-Yan Lee, Kimberley Lam-Tin-Cheung, Grace Zhao, Sachin Doshi, Tyler Chesney, Marina Englesakis, Jelena Lukovic, Grainne O’Kane, and et al. 2021. "Interventions and Outcomes for Neoadjuvant Treatment of T4 Colon Cancer: A Scoping Review" Current Oncology 28, no. 3: 2065-2078. https://doi.org/10.3390/curroncol28030191

Article Metrics

Back to TopTop