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| | 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. |
| Previous Definitions: | invasive breast cancer, invasive cancer, invasive cervical cancer, invasive hydatidiform mole, invasive procedure | | Next Definitions: | investigational, investigational agent, investigational drug, investigator, inviable |
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