Intestinal obstruction in the neonatal period secondary to the congenital anomalies of malrotation, peritoneal bands, atresias, stenoses, reduplications, and meconium ileus are well-recognized clinical entities which have been lucidly and precisely described and reported in the surgical literature and standard textbooks. In 1922 Davis and Poynter1 were able to collect 392 cases of congenital occlusion of the intestine between the pylorus and the anus from the world literature. Since 1922 similar reports have been so numerous that additional case reports serve no function unless some unusual feature is present which has rarely been encountered. A careful review of the literature has revealed no recent description of intestinal obstruction of the newborn due to a rectosigmoid valve. However, in 1900 Ecoffet,2 in a thesis on congenital intestinal occlusions, cited a case of intestinal obstruction in an 18-day-old child due to the presence of a valve in the transverse colon.