Colonic fistulization of a hydatid splenic cyst. An unusual complication as the debut of the disease.

Hydatidosis is a zoonosis caused by Echinococcus granulosus that typically affects the liver and lungs, with splenic involvement being rare. This case refers to a complication in the form of colonic fistulization of a splenic hydatid cyst, which required both medical and surgical treatment.