Genito-urinary surgery and venereal diseases / by J. William White and Edward Martin.

  • White, J. William (James William), 1850-1916.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: Genito-urinary surgery and venereal diseases / by J. William White and Edward Martin. Source: Wellcome Collection.

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    liable to be segmented by fracture: hence in many cases several calculi are found placed in line and articulating with one another. (Fig. 41.) Prostatic calculi growing backward encounter much pe- ripheral resistance in the region of the vesical neck. Having passed this, there is nothing to prevent their extension in all directions. Hence these calculi often exhibit the appearance of two nodules connected by a narrow bar. (Fig. 42.) Fig. 42. Urethral calculi showing mushroom shape. Cross-sections to exhibit lamination. The growing calculus may cause great dilatation of the infantile urethra. In the adult there is more commonly ulceration, the calcu- lus escaping into the periurethral tissues, and sometimes in this posi- tion attaining great size before it reaches the surfaces or causes inflam- mation or urinary infiltration sufficiently serious to require operation. Usually the ulcerating cavities in which these calculi lie open exter- nally. In about twenty per cent, of cases urinary infiltration occurs. A calculus which has thus left the urethra, and which lies in a cavity which communicates with the latter only by a narrow opening, cannot be detected by the passage of urethral instruments. %mptoms.—Calculi which form in the urethra would give no other