Pyloric atresia. A hereditary congenital anomaly with autosomal recessive transmission.

Pyloric atresia is a rare congenital anomaly; to date, only 29 newborns with this defect have been reported. Though familial occurrence of this anomaly has been reported twice (Benson and Coury, 1951; Thompson et al, 1968; Bronsther, Nadeau, and Abrams, 1971), no previous comments have been made concerning a possible genetic aetiology. The purpose of this paper is to report 5 additional familial cases* from two unrelated Israeli sibships and to stress the genetic factor responsible for this anatomical defect.