THE incidence of congenital anomalies of the rectum and appears to being S.W., male aged 2 years. Following an uncomplicated recorded by Ladd and Gross (1941) as I in 5000~ pregnancy, delivery was normal. He was noticed at birth and by Farr and Brunkow (1925) as I in Io,oOO, to have a perineal hypospadias and what was considered to but no figures are available as to the frequency of be a prolapse of the anorectal mucous membrane. When CASE REPORT FIG. 97.-Right side of face to show accessory auricles and auricular dimples.such anomalies in association with a perineal hypospadias.For an explanation of these anomalies one is handicapped by the failure of the embryologists to agree upon the exact nature of development in this region. Denis Browne (1951) is, however, of the opinion that the aetiology is best explained by adherence to the hypothesis of Wood Jones " t h a t the rectum develops as an off-shoot from the hindgut ", rather than the more orthodox theory that it is formed by the division of the cloaca by the growth of a septum; thus explaining the fact that this outgrowth not infrequently misses the proctodeal pit where it should form a normal anus. FIG. 98.-Full face, to show asymmetry and underdevelopment of right side of mandible.
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