Editing Stones: Lower Urinary Tract Calculi (section)

== Prostatic calculi ==

* '''Believed to arise as a result of inspissation of prostatic secretions within the prostatic ducts'''
** '''Majority are found in the posterior and posterolateral zones of the prostate,''' along the course of large prostatic ducts; large stones are rarely found within the central zone.
** '''Generally composed of calcium phosphate and calcium carbonate'''
* '''Typically asymptomatic'''; however, there have been rare cases of exceptionally large calculi causing urinary tract obstruction
* Serum prostate-specific antigen levels are unaffected by the presence of prostate calculi.