Isolated hydatid cyst of spleen with cystocolic fistula: An unusual case.

Hydatid cyst is a zoonotic disease caused by the cestode Echinococcus granulosus. Humans are incidental intermediate host. Liver and lungs are most common sites involved in hydatid cyst. Spleen, kidney, central nervous system, thyroid, breast are other rare sites. Here we present a unique case of a 48 yr female having isolated hydatid cyst of spleen, with the cyst having ruptured into the splenic flexure of colon.