Epidermoid carcinoma of the frontal sinus secondary to cholesteatoma.

We report a case of primary epidermoid carcinoma of the frontal sinus associated with cholesteatoma. We postulate that the carcinoma is secondary to malignant degeneration of the cholesteatoma. The literature review revealed 38 cases of cholesteatoma of the frontal sinus. Four were associated with carcinoma. To the best of our knowledge, this is the fifth such case in the world literature.