Wandering spleen in an adult man associated with the horseshoe kidney.

Introduction: A wandering spleen occurs when there is a laxity of the ligaments that fix the spleen in its normal anatomical position.

Case Presentation: This is a case report of a wandering spleen with horseshoe kidney in a 29-year-old male admitted with acute lower abdominal pain and vomiting to emergency department of Shariati hospital in Isfahan province. Sonographic examination showed a homogeneous 21 × 15 × 8 cm mass in the lower part of the abdomen and pelvis associated with a horseshoe kidney.