Bone scan-demonstrated urinary tract abnormalities in a patient with Rubinstein-Taybi syndrome.

A 22-month-old boy had a Tc-99m-MDP bone scan. This revealed multiple urinary tract anomalies (bladder distention, ectopic and small right kidney, hypertrophied left kidney, and bilateral hydronephrosis). The defects, fortuitously appreciated by means of the bone images, led to the correct diagnosis of urinary retention and infection as the cause of the child's symptoms. The urinary tract anomalies were associated with the Rubinstein-Taybi syndrome.