PRIMARY HYDATIDOSIS IN THIGH, AN UNUSUAL LOCATION

Hydatidosis is a zoonotic infestation, which generally involves the liver and the lungs. Primary muscle hydatidosis is an uncommon finding, accounting for only less than 5 percent of hydatid cyst locations. Clinical symptoms are insidious and non-specific causing a frequent delay in diagnosis. Intramuscular hydatid disease can cause a variety of diagnostic problems, especially in the absence of typical radiologic findings.We report the observation of a 58 year old woman consulting for two swellings in back of left thigh. CT and MRI thigh showing two cystic lesions, to consider hydatid cyst or Cysticercosis. En block surgical excision of the cysts was undertaken. Histopathologic findings confirmed the diagnosis of hydatid cyst. Skeletal muscle hydatidosis should be considered in the differential diagnosis of limb masses. A meticulous history taking and MRI imaging are essential, while pericystectomy is an effective method of treatment.