造釉細胞瘤是個表皮衍生、非功能性的腫瘤，發病年齡平均為 30 到 40 歲，無性別差異。 該腫瘤臨床症狀通常無痛而沒有明顯症狀。疾病主要經由影像學診斷後透過取得病理組織來確 診。治療方式以腫瘤切除合併重建手術為主。針對臨床無法手術或拒絕手術之治療方法則尚未 有明確共識。放射治療可以增加腫瘤局部控制的機會。本病例報告為一位 50 歲患者因前側下 顎無痛性腫瘤前來就診。組織病理學診斷為造釉細胞瘤。患者拒絕接受手術。安排三度空間順 形放射治療（3D-CRT）60 Gy 治療三十次後，追蹤六年仍無復發。

Ameloblastoma is an epithelial origin, nonfunctional neoplasm. The patients are equal in gender and reported to have mean age between 30 to 40 years old. The clinical manifestations of this tumor are generally painless without obvious symptoms or signs. The disease is tentatively diagnosed by imaging study, and is confirmed histologically. The main treatment for ameloblastoma is tumor resection with or without reconstruction surgery. The optimal treatment options for clinically inoperable disease or refusal of operation are not defined. Radiotherapy is able to increase the likelihood of local control. The 50-year-old patient visited our hospital due to painless mass over his anterior mandible. Histologic examination showed ameloblastoma. The patient refused operation. Radiotherpy with 60 Gy in 30 fractions by three-dimensional conformal radiation therapy (3D-CRT) was delivered. After 6-year follow-up, there was no local recurrence.