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Bladder

Acquired non-neoplastic anomalies

Collagen polyp

Reviewers: Alcides Chaux, M.D., Johns Hopkins University School of Medicine (see Reviewers page)
Revised: 26 March 2011, last major update March 2011
Copyright: (c) 2003-2011, PathologyOutlines.com, Inc.

Definition
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● Polyp secondary to collagen injection to control urinary stress incontinence or improve function of urinary pouches (Urology 1999;54:815)

Epidemiology
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● Very unusual complication of periurethral collagen injection

Micro
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● Polypoid lesions show submucosal accumulation of eosinophilic, homogeneous, poorly cellular material (Mod Pathol 1999;12:1090)

Positive stains
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● Trichrome (strong), PAS (weak)

End of Bladder > Acquired non-neoplastic anomalies > Collagen polyp

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