NCIt synonyms : Inverted Papilloma of the Frontal Sinus; Inverted Papilloma of Frontal Sinus; Frontal Sinus Inverted Schneiderian Papilloma;
NCIt definition : A benign neoplasm that arises from the ciliated respiratory mucosa that lines the
frontal sinus. It results from the invagination and proliferation of epithelial cells
in the underlying stroma.;