A Rare Case of Sinonasal Ameloblastoma with Immunohistochemistry.

ABSTRACT

Introduction: Ameloblastoma is benign locally aggressivedentine epithelial tumor. Mandible and maxilla are commonsites of involvement. Calretinin is specific marker and usefulto differentiate ameloblastoma from Keratocystic odontogenictumor. The rarity of site and presentation of lesion makes usreport this case.Case report 46 year old female had recurrent nasalblockage. Polyps in right nostrils were seen on Rhinoscopy.Polypectomy was done for suspected antrochoanal polyps.Ameloblastoma was diagnosed on histopathology andconfirmed by Immunohistochemistry with Cytokeratin,Calretinin and WT1.Conclusion: Preoperative diagnosis by biopsy in unilateralnasal masses should be carried out to expect the unexpected.Immunohistohemistry should be performed in cases havingrare site to confirm the diagnosis.