Unusual position of the spleen--a report of two patients.

An unusual position of the spleen may cause diagnostic difficulties and may mimic disease. We report two patients with an unusual position of the spleen. In one, congenital absence of the lieno-renal ligament allowed unusual mobility of a bilobed spleen with intermittent torsion. In the other the spleen descended into the left renal fossa following left adrenalectomy and nephrectomy.