title: Structural alterations in the tunica albuginea of the penis: impact of Peyronie's disease, ageing and impotence.
abstract: OBJECTIVE
  To investigate whether changes in the structure of the tunica albuginea influence the development of erectile dysfunction.
  
  
  METHODS
  Biopsy specimens taken from the tunica of 64 patients (both potent and impotent) with and without Peyronie's disease were evaluated. Tissue samples were stained and examined under light and electron microscopy, and the concentration of elastic fibres present in each was measured using computerized image analysis.
  
  
  RESULTS
  The concentration of elastic fibres was lower in impotent than in potent patients (P = 0.0365) and was also significantly less in patients with Peyronie's disease. Furthermore, the concentration of elastic fibres decreased with age. Electron and light microscopy revealed the presence of distinct alterations in the tunica albuginea in impotent patients and patients with Peyronie's disease that might interfere with function.
  
  
  CONCLUSIONS
  The decrease in elastic fibre concentration and changes in microscopic features may contribute to erectile dysfunction by impairing the veno-occlusive function of the tunica albuginea.
authors.affiliation: Department of Urology, University of California School of Medicine, San Francisco, USA.
authors.forename: E
authors.initials: E
authors.lastname: Akkus
authors.forename: S
authors.initials: S
authors.lastname: Carrier
authors.forename: K
authors.initials: K
authors.lastname: Baba
authors.forename: G L
authors.initials: GL
authors.lastname: Hsu
authors.forename: H
authors.initials: H
authors.lastname: Padma-Nathan
authors.forename: L
authors.initials: L
authors.lastname: Nunes
authors.forename: T F
authors.initials: TF
authors.lastname: Lue
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000473:pathology*; D004547:Elastic Tissue / Q000473:pathology; D007172:Erectile Dysfunction / Q000473:pathology*; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D010411:Penile Induration / Q000473:pathology*; D010413:Penis / Q000473:pathology*