[Primary plexiform ameloblastoma in the sinonasal tract of a 49-year-old female patient. Case report].

Sinonasal ameloblastoma is a rare tumor, which most frequently affects male patients in the 6th-7th decade. We report on the case of 49-year-old female patient presenting with nasal obstruction. Computed tomography revealed a solid and hypodense mass filling the maxillary sinus and the nasal cavity. The histological examination showed a plexiform ameloblastoma without significant bone erosion. Viewing this together with the literature review, we suggest that sinonasal ameloblastoma in female patients becomes apparent approximately one decade earlier than in male patients. This tumor should be considered in the differential diagnosis of unilateral sinonasal symptoms.