Tehran University of Medical Sciences Iranian Journal of Parasitology 1735-7020 14 3 2019 09 23 487 491 EN Mirsalim SEYEDSADEGHI Department of Surgery, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran Jaffar GHOBADI Department of Emergency Medicine, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran Negin HAGHSHENAS Department of Anesthesiology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran Afshin HABIBZADEH Department of Internal Medicine, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran 2018 04 10 2018 11 21 Hydatid cyst caused by Echinococcus granulosus usually involves lung and liver but can appear in other organs. We report a 29-yr-old woman presented to Fatemi Hospital, Ardabil, Iran in 2017 with progressive painful swelling of the left gluteus which in imaging showed hydatid cyst. The cyst was successfully en blocked and the patient was discharged on albendazole treatment with no recurrence in the symptoms during the first week, first and second months after surgery follow-up and in the final visit at third months. In the endemic regions, the possibility of hydatid cysts should be considered in differential diagnosis of any cystic mass.  https://ijpa.tums.ac.ir/index.php/ijpa/article/view/2081