Maxillary malignant ameloblastoma with intraorbital extension: report of case.

The case of an aggressive and malignant ameloblastoma of the maxilla in a 22-year-old Nigerian man has been presented. The features that may lead to the development and diagnosis of malignancy in this type of tumor are briefly described and discussed. The relatively young age of this patient, especially in an environment in which medical advice is sought very late, is noteworthy.