Hydatid cyst - iliacus muscle


MRI features of a hydatid cyst of the iliacus muscle.

Musculoskeletal hydatid infections are a very rare form of hydatid disease. The most common locations are vertebrae/para-vertebral soft tissue, pelvis, femur and soft tissue of the lower limb. The contractile nature and high lactic acid level of the muscles diminish the growth process of the oxygen-dependant cysts.