This case of congenital hour-glass stomach with accessory pancreas, occurring in a three months' old child, is worth recording on account of the rarity of condition and the variety of opinions expressed in the literature concerning it.
There are two recognized forms of hour-glass stomach, the acquired, resulting from ulcer, cicatrix or other pathologic change taking place after birth, the other variety, congenital hour-glass stomach, being of prenatal origin.
Although the congenital anomaly has received comparatively little attention, yet from time to time descriptions have appeared and theories have been advanced to account for it. Some authorities believe that when there are no additional pathologic alterations besides the constriction, one is justified in assuming a congenital origin for the hour-glass malformation. Others maintain that an hour-glass stomach of congenital origin has never been found and that all reported cases can be accounted for by some change taking place after birth.
GARDINER JP. A CASE OF CONGENITAL HOUR-GLASS STOMACH WITH ACCESSORY PANCREAS.. JAMA. 1907;XLIX(19):1598-1600. doi:10.1001/jama.1907.25320190032001i