Özet:

A 39 years old woman was admitted to the hospital due to swelling and pain on her left lumbar region. In family history we learned that; her 19 years old daughter was operated due to primary muscular hydatid cyst located on gastrocnemius muscle one year ago. A painful painful mass with a size of 6x5 cm was palpated on patients\' left lumbar region during physical examination. Her indirect hemaglutination (IHA) for Echinococcus granulosus was positive. The lesion was reported as muscular hydatid cyst during ultrasound and computed tomography ex­aminations. Hydatid disease was not in the previous his­tory of the patient. Partial cystectomy and drainage was performed under spinal anesthesia on prone position. Excised material was confirmed as a hydatid cyst in histo­pathological examination. Albendazol (15 mg/kg/day) was given to patient for three months following the operation. There were no postoperative complications. After 6 month follow up, the patient showed no evidence of recurrent hy­datid disease. A hydatid cyst should be considered in the differential diagnosis of muscular cystic lesions in regions where hydatid cysts are endemic. Positive family history may help us in suspicion to this disease. If total excision is impossible, partial cystectomy and drainage can be the choice as surgical treatment for a muscular hydatid cyst.

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