Correction of a Posteriorly Placed Urogenital Sinus or Vaginal Opening
This is a very rare malformation, in which the vaginal or urogenital sinus opening is placed posteriorly, close to the anus. One might say that it is the anatomic counterpart to the anteriorly placed anus, though it has a different embryology. To date we have seen only three instances of this malformation. Corrective surgery may be undertaken immediately after the neonatal period in children who have done well for 3–4 weeks, i.e., around the 6th–8th week of life. The surgical technique is similar to that for correcting the ectopic anus, but “reversed” (Fig. 23).
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