*2.2. Eligibility Criteria*

The studies included in this review were original articles, written in English, published between 2000 and 2021, and reporting on the use of FIGS in preserving the PGs and their blood supply or preventing hypoparathyroidism during thyroid cancer surgery. Articles that report on the use of fluorescence imaging for other procedures or diseases other than thyroid cancer were excluded. Studies not presenting original patient data, animal studies, case reports, conference abstracts, technical notes, and articles written in languages other than English were also excluded.
