Inverted papilloma

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Caption = Histopathology representing an inverted papilloma of the urinary bladder that was cystoscopically resected. Hematoxylin and eosion stain.
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An inverted papilloma is a type of tumor in which surface epithelial cells grow downward into the underlying supportive tissue. It may occur in the nose and/or sinuses or in the urinary tract (bladder, renal pelvis, ureter, urethra). When it occurs in the nose or sinuses, it may cause symptoms similar to those caused by sinusitis, such as nasal congestion. When it occurs in the urinary tract, it may cause blood in the urine.

External links

* [http://www.cancer.gov/Templates/db_alpha.aspx?CdrID=346512 Inverted papilloma] entry in the public domain NCI Dictionary of Cancer Terms


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