A papillary tumor is a tumor shaped like a small mushroom, with its stem attached to the epithelial layer (inner lining) of an organ. It consists of papillae, which are outgrowths that consist of stroma with at least one central blood vessel, surrounded by epithelium. Usually, the epithelium constitutes the true tumor cells, and the fibrovascular cores (stroma and blood vessels) consist of reactive supportive tissue.
References
External links Papillary tumor entry in the public domain NCI Dictionary of Cancer Terms This article incorporates public domain material from Dictionary of Cancer Terms. U.S. National Cancer Institute.



