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An Unusual Cause of Unilateral Nasal Obstruction: Ameloblastoma

Ameloblastomas constitute about 1% of all jaw cysts and tumors. They are aggressive neoplasms arising in the mandible or maxilla and consist of proliferating odontogenic epithelium supported by fibrous stroma. When present in the maxilla they may extend into the maxillary sinus, the nose, the orbit, or even the base of the skull. Various theories have been proposed as to the pathogenesis of these lesions. Most, however, agree that they only rarely arise from a nonneoplastic or dentigerous cyst. Isolated reports exist of extraosseous, peripheral, or soft tissue ameloblastomas. We present a case of a maxillary ameloblastoma that arose with no prior dental history. The patient presented with unilateral nasal obstruction and intermittent epistaxis of 3 years' duration. The unique presentation together with the highly destructive propensity of this lesion when originating in the maxilla makes it worthy of consideration in the differential diagnosis of nasal and maxillary masses.