Hydatid cyst is a parasitic infection caused by Echinococcus granulosus. Liver and lungs are the most common sites of hydatid cyst whereas abdominal wall is an extremely unusual site. A 45-year-old man from was admitted to surgery outpatient clinic with complaints of painless and slow growing mass in the left inferior quadrant of abdomen for two years. Computed tomography demonstrated a solitary cystic mass localized between the muscle planes of the abdominal wall, doubtful for a hematoma. There were no additional cystic lesions in another organs such as liver and lungs. At operation, a whitish, thin-walled, and well-circumscribed cystic mass localized between the abdominal wall muscles under the fascia was totally excised. On histopathological examination, the lesion was reported as a hydatid cyst.

Hydatid cyst is a parasitic infection caused by Echinococcus granulosus. Liver and lungs are the most common sites of hydatid cyst whereas abdominal wall is an extremely unusual site. A 45-year-old man from was admitted to surgery outpatient clinic with complaints of painless and slow growing mass in the left inferior quadrant of abdomen for two years. Computed tomography demonstrated a solitary cystic mass localized between the muscle planes of the abdominal wall, doubtful for a hematoma. There were no additional cystic lesions in another organs such as liver and lungs. At operation, a whitish, thin-walled, and well-circumscribed cystic mass localized between the abdominal wall muscles under the fascia was totally excised. On histopathological examination, the lesion was reported as a hydatid cyst.