Squamous cell carcinoma developing in an odontogenic keratocyst.

A case of squamous cell carcinoma arising in an odontogenic keratocyst is presented. Although the patient was treated by wide local excision of the tumor, with radical neck dissection, and although the regional lymph nodes were free of metastatic deposits, the carcinoma recurred locally two months later and the patient died two years after the first operation with pulmonary metastases.