[Torsion and infarct of the spleen with benign lymphoid hyperplasia of the colon].

A case of an infant with vomiting and a palpable abdominal mass is discussed. His preoperative studies showed a double right collecting system and a benign lymphoid hyperplasia of colon. The laparotomy showed a spleen in an abnormal position with total ischemic necrosis due to torsion of a pedicle. Emphasis is made on the complementary studies to help the diagnosis.