A rare presentation of hydatid cyst disease at the thigh: a case report from Syria

Abstract

Introduction and importance: Hydatid cyst disease is a zoonotic disease caused by Echinococcus granulosus and is recognized as a significant health issue in many countries, particularly Mediterranean countries. Hydatid cysts in the musculoskeletal system are rare, with only a few reported cases. These usually occur as secondary cysts resulting from the hematogenous dissemination from primary sites. Case presentation: This paper reports a case of a 77-year-old man with a mass in his thigh that had been increasing dramatically in size for 4 months with no signs of local inflammation, fever, or any other symptoms. Findings from an MRI were consistent with a large abscess, so a true-cut biopsy was taken before referral. A pathological study after surgery revealed the lesion was a hydatid cyst, and a previously performed biopsy caused a rupture of the cyst. Clinical discussion: Misdiagnosing hydatid cysts, especially in non-usual areas, may lead to an unwelcome biopsy and consequences. Conclusion: This case report highlights the importance of considering hydatid cysts when encountering any enlarging mass, regardless of its location or rate of growth.