"Congenital malformations of the rectum and anus are rare. Various authors give the incidence of 1 in 5,000 to 1 in 10,000. No two lesions seem to be identical in their physical characteristics, though fundamentally they are all variations of a known embryonic plan of development."1
These figures refer to all types of anal and rectal anomalies. The incidence of the particular anomaly to be described in this paper is considerably smaller, as it comprises less than 30 per cent of the incidence of all anomalies of the rectum and anus. That this is so and that the operative mortality rate is high and the failure to accomplish a satisfactory result common are borne out in statements quoted by Young.2
Cripps3 collected 100 cases of imperforate anus. There were 13 male patients, of whom 10 died. Autopsy was performed on these. Six had fistulas between the prostate
THUNIG LA. ATRESIA ANI URETHRALIS: REPORT OF A CASE. Arch Surg. 1939;38(3):501–527. doi:10.1001/archsurg.1939.01200090108009
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