COMPLEX COLON DUPLICATION MIMICKING AN OBSTRUCTED, NONFUNCTIONING KIDNEY IN A NEWBORN WITH IMPERFORATE ANUS AND SPINAL DYSRAPHISM

Gastrointestinal (GI) duplications contain tissue resembling several p ortions of the GI tract and are associated with vertebral and genitour inary (GU) abnormalities [1-4]. We report a newborn with low, imperfor ate anus and lumbosacral dysraphism, who presented with a large cystic mass in the left renal fossa and pelvis. The flank mass (felt initial ly to be a dysplastic kidney and ureter) proved to be a complex GI dup lication with histologic evidence of gastric, small bowel, and colonic mucosa, as well as respiratory epithelium and pancreatic tissue.