Inverted papilloma

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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.

[edit] External links

• Inverted papilloma entry in the public domain NCI Dictionary of Cancer Terms

This article includes text from the U.S. National Cancer Institute's public domain Dictionary of Cancer Terms