Sinonasal carcinoma associated with inverted papilloma: a report of 16 cases.

Objectives: To analyse the characteristics and outcome of patients with carcinoma associated with inverted papilloma, and find predictors of associated malignancy.

Methods: The medical records of 228 patients who were diagnosed with IP between January 1990 and December 2010 were retrospectively reviewed. Out of 228 patients, 16 were also diagnosed with carcinoma.