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Urorectal septum malformation sequence: Insights into pathogenesis.

Authors
  • Jo Mauch, Teri
  • Albertine, Kurt H
Type
Published Article
Journal
The Anatomical record
Publication Date
Dec 01, 2002
Volume
268
Issue
4
Pages
405–410
Identifiers
PMID: 12420289
Source
Medline
License
Unknown

Abstract

We characterize the urorectal septum malformation sequence (URSMS) in discordant fetal lambs and relate it to the human syndromes with which URSMS is associated. We found abnormal external genitalia, imperforate anus, and fistulous connections between the rectum, bladder, and vagina. Discordance among the dizygous twins eliminated teratogens as a likely etiologic factor. We summarize the relevant literature and propose a molecular model for the pathogenesis of the URSMS, in which alterations in sonic hedgehog and homeobox genes lead to caudal mesodermal deficiency during blastogenesis.

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