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. The disease is Monarch Disease Ontology identifier MONDO_0002537 (inverted papilloma). Also known as: inverted papilloma, squamous cell.