A Rare Parasitic Infection: Primary Intradural Extramedullary Hydatid Cyst.

Echinococcus granulosus infrequently induces spinal hydatid cysts, and intradural hydatid cysts are extremely rare among these spinal hydatid cysts. We report a 30-year-old man with a history of progressive back pain caused by a previous back injury. Magnetic resonance imaging revealed a spinal intradural cystic lesion. After surgical removal, histopathological diagnosis was a hydatid cyst. The patient had no other symptoms of systemic hydatid cyst disease. Diagnosis of hydatid cyst should be considered prior to surgery, especially in young patients with spinal intradural cystic lesions, as leakage of the hydatid cyst's fluid during surgery is a frequent case of recurrence.