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urinoma

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urinoma /uri·no·ma/ (u″rĭ-no´mah)
1. a cyst containing urine.
2. a collection of urine surrounded by fibrous tissue, from leakage through a tear in the ureter, renal pelvis, or renal calix due to obstruction, or from trauma.

u·ri·no·ma (yr-nm)
n. pl. u·ri·no·mas or u·ri·no·ma·ta (-m-t)
A cyst containing urine.

urinoma
[yoo͡r′inō′mə] pl. urinoma, urinomata,
a cyst filled with urine.

urinoma [u″rĭ-no´mah]
a collection of urine encapsulated by fibrous tissue, resulting from leakage of urine from a tear in the ureter, renal pelvis, or renal calices because of obstruction of the ureter or trauma.

urinoma
a subperitoneal accumulation or a cyst containing urine.

urinoma
Pediatric urology A tumor-like urine-filled cyst seen in the renal capsule of children, which is 2º to congenital urethral obstruction, in which urine extravasates into subcapsular or perirenal spaces via ruptured calyceal fornices


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Perinephric abscesses are uncommon but can occur in the early postoperative period and are caused by pyelonephritis or bacterial seeding of a urinoma, hematoma, or lymphocele.
While urine extravasation is not necessarily an indication for surgery, it is nonetheless important to recognize, since a delay in diagnosis can lead to increased morbidity due to urinoma formation, increased rate of nephrectomy, and longer hospital stays.
If the collection is of fluid density, delayed computed tomographic (CT) images revealing filling of this collection with dense contrast material at CT is diagnostic of a urinoma secondary to a leak or rupture of the ureter.
 
 
 
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