Primary Subcutaneous Hydatid Cyst in Scapula

Hydatid disease, caused by larval stage of echinococcus granulosus, is a common parasitic infectionof human and animal. although liver and lung are the most commonly affected area, hydatid cystmay develop any part of the body. primary subcutaneous hydatid cyst is extremely rare. we reporta case of 54 years old man who presented with palpable mass in scapular region from 3 yearsago. present and past medical history was not significant finding. pathologic evaluation identifiedthe cystic structure as unilocular hydatid cyst. primary hydatid disease constitutes a potentiallyserious differential diagnosis of any subcutaneous mass in endemic area of hydatid disease.