An unusual cause of right lower quadrant pain in a prepubertal child.

The clinical course of a five-year-old girl with right lower abdominal pain is presented. The differential diagnosis of right lower quadrant abdominal pain in a prepubertal child and a discussion of this child's diagnosis, ovarian torsion, are provided. The need always to consider gynecologic disease in any female patient presenting with a history of colicky lower abdominal pain or an acute abdomen is emphasized.