A Case Report of Rare Kidney and Muscle Hydatid Cyst in An 11-Year-Old Child

Hydatid kidney and muscle involvement without liver and lung infection is very rare in children. Hydatid kidney disease can occur as cystic or even solid mass which has a differential diagnosis with a renal cystic tumor. The aim of this rare case report was to investigate the diagnostic and therapeutic pitfall of hydatid renal cyst in endemic areas.

CASE REPORT:

 This is a very rare case in an 11-year-old girl with past history of thigh muscle hydatid cyst 2 years ago who referred with vague abdominal pain. Serologic tests were negative and complex cystic mass with thickened irregular walls with vascularity and relative enhancement in the secretary phase were reported in computerized tomography (CT) scan, without involvement of any organs. Extra-peritoneal nephrectomy was performed with possible diagnosis of renal cystic tumor and final diagnosis was hydatid cyst. Ultrasonography, chest X ray and indirect hemagglutination test were performed and no evidence of recurrence or new infection was observed during one year follow up.

Considering the introduced case, in patients with complex renal cysts, in addition to considering renal cystic tumors, renal hydatid cysts should be considered in differential diagnosis in endemic areas, even if serological and radiological evaluations are not confirmatory. Furthermore, if surgery is required, it is better to consider extraperitoneal incision.