Twenty-four-year-old male patient was admitted with the complaint of swelling on the front of the left leg. On physical examination, on the anterior face of the thigha fluctuating mass was detected about 5x3 cm in size. The mass was considered to be a lipoma, t sIHAwas not studied; but superficial USG was performed. Superficial ultrasound was reported to be compatible with hydatid cyst. In the absence of any evidence of disease in other organs, the patient underwent surgery and the mass was totally removed. Histopathological examination confirmed the diagnosis of hydatid cyst. Superficial soft tissue masses are usually considered as benign events consisting of adipose tissue and additional inspection requirements are not foreseen. We agree that it will be useful if soft tissue masses are confirmed by USG although they are small.
Keywords: Cyst hydatid, unusual localization, sartorius muscle