Document Detail

Fetal development of striated and smooth muscle sphincters of the male urethra from a common primordium and modifications due to the development of the prostate: an anatomic and histologic study.
MedLine Citation:
PMID:  15389795     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The aim of the study was to investigate the development of the human urethral sphincter complex during fetal development. METHODS: 23 human male fetal specimens were investigated. The histological sections were processed according to the epoxy resin-based plastination technology. RESULTS: At 9th week of gestation, a combined sphincteric primordium of the rhabdosphincter and the lissosphincter is situated at the anterior and lateral aspects of the membranous and prostatic urethra. Both muscular components assume an omega-shaped configuration due to the presence of a constant connective tissue raphe posterior to the urethra that anchors the rhabdosphincter in the perineal body. Development of the prostate laterally and posteriorly does not modify the growth of the urethral sphincter complex anteriorly but inhibits its development laterally and posteriorly. CONCLUSIONS: The important morphological characteristics of the male adult rhabdosphincter and lissosphincter can be seen very early in fetal development.
Philippe Sebe; Christian Schwentner; Josef Oswald; Christian Radmayr; Georg Bartsch; Helga Fritsch
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Prostate     Volume:  62     ISSN:  0270-4137     ISO Abbreviation:  Prostate     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-01-20     Completed Date:  2005-03-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8101368     Medline TA:  Prostate     Country:  United States    
Other Details:
Languages:  eng     Pagination:  388-93     Citation Subset:  IM    
Copyright Information:
(c) 2004 Wiley-Liss, Inc.
Department of Urology, Tenon Hospital, Paris, France.
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MeSH Terms
Fetal Development
Muscle Development
Muscle, Skeletal / embryology*
Muscle, Smooth / embryology*
Prostate / embryology*
Urethra / embryology*

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