Hydatid cyst of the thigh: a challenging diagnosis

Description

Hydatid disease is a common infection in Mediterranean countries. It is caused by a parasite 'Echinococcus granulosus', which may affect several organs. Liver and lungs are frequent locations. Primary hydatid cyst located in the musculoskeletal system is uncommon.1

These images illustrate the case of a 27-year-old man without past medical history who presented with a swelling of the right thigh that appeared 6 months ago. Physical examination showed a tender mass of the upper third of the right thigh. There was no history of trauma or fever. Inflammatory blood markers were normal. Ultrasonography was first performed revealing a huge multilocular intramuscular cystic mass of the thigh without tissue components or calcifications. The aspect was suspicious of a cystic lymphangioma. An MRI of the thigh was performed to evaluate accurately the size of the mass and its location. It revealed a voluminous mass of 10x6 cm developed in the...

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