Primary Hydatid Cyst of the Thigh , an unusual localization: a case report

Introduction: Subcutaneous musculoskeletal hydatid cysts are rare ,representing around 1-5%.It mimicsa soft tissue tumor ,so preoperative radiological diagnosis is important to choose the treatment.Case Presentation: This case was presented to clinic in Prince Ali Hospital in Karak . A 78 years oldfemale patient was presented complaining of right medial thigh swelling which appeared a few weeksago.The swelling caused discomfort and pain .On exam ,a lump was located in the medial aspect of theright thigh,round,soft,non mobile. Her US revealed multiple well defined cystic lesions in the posterioraspect of the thigh, with internal septae mostly representing a hydatid cyst. A MRI was ordered andshowed a large,multi-lobular, thin walled and non-calcified fluid containing cyst. The appearance wasconsistent with a hydatid cyst.Next,the patient underwent abrain,chest and abdominal CT to check if therewas aprimary source,the results were negative.An Echinococcus Granulosa titer test was ordered, theresult was negative. Treatment options were discussed.we preferred to start with the conservativeapproach.So,a high dose of Albendazole was started,with regular follow up in the clinic,but conservativetreatment failed so we decided to continue with surgical treatment by complete excision.Conclusion: Echinococcal disease should be considered in any patient who presents with a cystic massdespite body location. Especially in endemic areas.

Primary Hydatid Cyst of the Thigh , an unusual localization: a case report Keywords:

Hydatid Cyst , Thigh , Endemic area