Inverted papilloma
Inverted papilloma
Definition
An endophytic benign papillary epithelial neoplasm that results from the invagination and proliferation of epithelial cells in the underlying stroma. Representative examples are the inverted urothelial papilloma that arises from the urinary tract and inverted Schneiderian papilloma that arises from the nasal cavity or paranasal sinuses.
Also known as inverted papilloma — per MONDO