Urethral and periurethral lithiasis / by Victor Cox Pedersen.

  • Pedersen, Victor Cox, 1867-1958
Date:
[1913]
Catalogue details

Licence: In copyright

Credit: Urethral and periurethral lithiasis / by Victor Cox Pedersen. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Lithiasis of the posterior urethra, like that of the anterior urethra, involves impaction and for- mation as the two main causes and endourethral and periurethral sites as the chief locations, and affects children very rarely, but adolescents, adults, and the aged much more commonly as the sequel of antecedent disease processes. Its products may also be endourethral and exourethral calculi, ex- actly as in the case of lithiasis of the anterior ure- thra. The exourethral manifestations are almost invariably due to disease in the prostate or to operations upon this gland. Endourethral calculi of the posterior urethra are strictly those of the prostatic urethra, as the mem- branous portion may obstruct, but does not harbor these concretions, which are almost always migra- tory with impaction in the normal urethra, but for- mative in the anatomically abnormal or pathologi- cally deformed channel. They are, therefore, sub- divisible into free, diverticular, and urethrovesica] calculi, any and all of which may be solitary or multiple. Free endourethral calculi of the prostatic urethra are most common; lie loose in the dilated urethra; are, as a rule, small and multiple, in apposition, and facetted, the greater the number the smaller the size and vice versa, and have weighed from 200 to 300 grains. These calculi have descended from the bladder and have conserved their mobility. In front, the membranous portion arrests them. Be- tween this and the neck of the bladder they ac- cumulate, the prostate undergoing dilatation. A sort of gutter for the passage of urine may be pres- ent. . Diverticular endourethral calculus of the prosta- tic urethra is more rare, the calculus being inclosed in a urethral diverticle, appearing in the endoscope as part of the urethral wall, the rest being hidden in the prostatic tissue, and possibly having the