Penis and scrotum
Inflammatory lesions
Os penis


Topic Completed: 1 February 2010

Revised: 13 February 2019

Copyright: 2002-2019, PathologyOutlines.com, Inc.

PubMed Search: Os penis[TIAB]

Alcides Chaux, M.D.
Antonio L. Cubilla, M.D.
Page views in 2018: 252
Page views in 2019 to date: 214
Cite this page: Chaux A, Cubilla AL. Os penis. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/penscrotumospenis.html. Accessed July 23rd, 2019.
Definition / general
  • Heterotopic bone in penis (Eur Urol 1984;10:420), most commonly in elderly and also children
  • Note: male mammals except chimpanzees and humans have an intrapenile bone (bacula); humans have an equivalent strong distal ligament composed of type I collagen in the glans (J Androl 2005;26:624)
Terminology
  • Also called baculum, penis / penile bone
Etiology
  • Penile ossification may occur after trauma (Urology 1990;35:349)
  • Also associated with diabetes, gout, venereal disease, Peyronie disease and neoplasia
  • Rarely congenital (J Urol 1964;91:663)
Clinical images

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Raccoon

Dog

Walrus

Figure F

Microscopic (histologic) images

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Figure C

Differential diagnosis
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