Extraosseous Ameloblastoma of Maxillary Gingiva- A Case Report

Abstract

Amelobasltoma is a benign neoplasm of the jaw bones that originate from the odontogenic epithelium. They are more common on the mandible than the maxilla. Rarely such tumours arise outside these bones, when they are termed extraosseous or peripheral ameloblastoma. We report a case of extraosseous ameloblastoma in a 30 year old woman, who presented with a painless lesion on the upper gingiva. The lesion was excised completely and the histopathology was suggestive of extraosseous ameloblastoma.

Malignant peripheral ameloblastoma arising from the gingiva: A case report

“…However, since both recurrence and malignancy have been documented despite resection, long-term follow-up is necessary, especially in cases with features suggestive of malignancy. [13][14][15] …”

“…[5] Differential diagnosis includes peripheral giant cell granuloma, peripheral odontogenic fibroma, peripheral ossifying fibroma, papilloma, pyogenic granuloma, epulis, and fibroma. [13][14][15] Radiological examination may demonstrate superficial cortical bone erosion or depression, which are known as "cupping" or "saucerization". [14,15] However, there may not be any radiographic evidence of bone involvement.…”

“…[13][14][15] Radiological examination may demonstrate superficial cortical bone erosion or depression, which are known as "cupping" or "saucerization". [14,15] However, there may not be any radiographic evidence of bone involvement. [14,15] Histological examination would reveal similar characteristics to intraosseous ameloblastomas.…”

“…[14,15] However, there may not be any radiographic evidence of bone involvement. [14,15] Histological examination would reveal similar characteristics to intraosseous ameloblastomas. [16,17] According to the World Health Organization, the histological features of the follicular variant of peripheral ameloblastomas include islands of odontogenic epithelium within a fibrous stroma and peripheral palisading basal cells with vacuolated cytoplasm and hyperchromatic nuclei displaced away from the basement membrane.…”