Ruptured splenic abscess secondary to infectious mononucleosis.

A 24-year-old woman with a recent diagnosis of infectious mononucleosis presented with fever and left upper quadrant pain. Abdominal computed tomography revealed a splenic abscess that at laparotomy was found to have ruptured. This case illustrates a rare cause of splenic abscess and a rare complication of infectious mononucleosis.