Recurrent primary intermuscular hydatid cyst of thigh - a case report

Abstract

Echinococcosis (Hydatidosis) is a zoonotic infection caused by Echinococcus granulosus (Dog Tapeworm). Muscular localisation of hydatid cyst is very rare condition and if found is mostly secondary to hepatic or pulmonary hydatidosis. Muscular hydatid cyst is usually difficult to diagnose due to lack of typical radiological finding. Hydatid Cyst has three coverings which include pericyst, ectocyst and an endocyst. Pericyst is the outermost layer made from the modified host cells. Endocyst, also known as a germinal layer is the innermost layer and produces Scolices from inside which represent larval Stage and laminated membrane from outside, which forms the middle layer. The middle laminated layer permits nutrients but is impervious to bacteria. When cyst becomes infected it may result in abscess formation and inadequate drainage of that abscess may account for recurrence of disease.