[Hydatidosis of the psoas muscle. Description of a case and review of the literature].

A rare case of echinococcus cyst of the psoas muscle is described in a 64-year-old male patient. Following evaluation with echotomography, CT and MRI, he was treated with Albendazole for five months. After there the cyst was evacuated by ultrasound-guided aspiration and he received another course of chemotherapy. Recent evaluation revealed the patient is well and cyst-free.