Verrucous carcinoma of the temporal bone.

Verrucous carcinoma is a highly differentiated variant of squamous cell carcinoma. In the literature, 11 cases of primary verrucous carcinoma of the temporal bone have been reported. We present a 48-year-old woman who had undergone radical mastoidectomy because of chronic otitis media 20 years ago; consequently, verrucous carcinoma occurred in the mastoid cavity.