A Rare Case of Sinonasal Ameloblastoma with Immunohistochemistry.

Abstract

Introduction: Ameloblastoma is benign locally aggressive dentine epithelial tumor. Mandible and maxilla are common sites of involvement. Calretinin is specific marker and useful to differentiate ameloblastoma from Keratocystic odontogenic tumor. The rarity of site and presentation of lesion makes us report this case. Case report: 46 year old female had recurrent nasal blockage. Polyps in right nostrils were seen on Rhinoscopy. Polypectomy was done for suspected antrochoanal polyps. Ameloblastoma was diagnosed on histopathology and confirmed by Immunohistochemistry with Cytokeratin, Calretinin and WT1. Conclusion: Preoperative diagnosis by biopsy in unilateral nasal masses should be carried out to expect the unexpected. Immunohistohemistry should be performed in cases having rare site to confirm the diagnosis.