**4. Conclusions**

There are very few cases of primary pleural hydatidosis reported in the literature. In our case, it was a diagnosis of exclusion for hydatid cysts within the pleural cavity, but with no obvious primary lesion that would explain the local contamination.

Cases of primary pleural hydatidosis are very rare but must be taken into consideration in patients from endemic regions with jobs that may have exposure to this parasite. Proper treatment, both surgical and antiparasitic medication, can lead to a full recovery and a low chance of recurrent disease.

Antiparasitic treatment plays a key role in the management of any form of hydatidosis; however, the main course of treatment is surgical.

**Author Contributions:** C.S. (Cornel Savu), V.G., A.M. —performed surgical procedures; I.B., M.D., B.S.—prepared the manuscript; I.B., C.D., C.S. (Carmen Savu), O.S. and V.V.—performed data analysis; L.I., N.B.—advised about the surgical oncology procedure, revised the final draft of the manuscript. All the authors agreed with the final version of the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
