Papillary tumor

A papillary tumor is a tumor shaped like a small mushroom, with its stem attached to the epithelial layer (inner lining) of an organ. A papillary tumor is a tumor shaped like a small mushroom, with its stem attached to the epithelial layer (inner lining) of an organ.  This article incorporates public domain material from the U.S. National Cancer Institute document 'Dictionary of Cancer Terms'.