Pyloric Duplication Cyst in Newborn Male.

An enteric duplication cyst (EDC) is a rare congenital anomaly. Although EDCs can occur at any point throughout the gastrointestinal tract, they are most commonly reported in the ileum and only around 5-7% are of gastroduodenal origin. We report a case of a pyloric duplication cyst in a 3 hour old male with prenatal ultrasound showing a cystic mass. The patient had an abdominal ultrasound after birth that showed a mass with probable trilaminar wall. The diagnosis of pyloric duplication cyst was made in surgery and confirmed with histopathologic examination following resection. The patient is doing well with appropriate weight gain at follow-up appointments.