Ameloblastoma is a slowly growing, locally invasive tumor that primarily originates from enamel tissue and odontogenic epithelium. On the brain magnetic resonance imaging of a 34-year-old female patient, a 3cm-sized cystic mass was gound in the right maxillary sinus. A computed tomography of the paranasal sinuses with contrast enhancement showed irregular internal contrast enhancement occupying the space in the right maxillary sinus. A right endoscopic sinus surgery (ESS) showed a cystic mass and extensive tissue sampling was conducted. Histopathological examination confirmed the diagnosis of ameloblastoma. Concurrent chemoradiotherapy (CCRTx) was administered by oncology and radiation oncology departments. Three years follow up showed no recurrence.
Key words: Unicystic ameloblastoma, endoscopy, maxillary sinus, surgery.
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