Intraperitoneal hemorrhage due to accessory spleen torsion: Case report.

Torsion of an accessory spleen is a rare condition, and it is often difficult to diagnose. It frequently presents as an acute abdomen, especially in young individuals. Only several dozen cases have been reported so far, and instances of rupture are even rarer. In this report, we present a case of an adult male who developed intraperitoneal hemorrhage due to torsion of an accessory spleen, presenting with left upper quadrant pain. A preoperative diagnosis was successfully made using contrast-enhanced computed tomography (CT), Angiography and magnetic resonance imaging(MRI). When encountering left upper abdominal pain or intraperitoneal hemorrhage, torsion of an accessory spleen should be considered as a differential diagnosis.