男,40岁,工人。因左侧上后牙松动来门诊要求拔除患牙。4月前其左侧上后牙疼痛且伴同侧腭部及面部肿胀,在当地医院给予肌注青霉素治疗后肿胀消退,但牙齿松动。门诊检查:张闭口运动正常,松动Ⅲ°、OP痛(-),无龋齿、根端牙龈有0.3×0.3cm大小的扁平结节状肿块,肿块表面色泽呈淡红色,基底部无蒂、无触痛。于门诊钳取肿块活检,报告“上腭部恶性肿瘤”, Male, 40 years old, worker. Due to loose left teeth on the left to ask for removal of diseased teeth. 4 months ago, the left posterior teeth pain and accompanied by ipsilateral palate and facial swelling in the local hospital to give intramuscular penicillin treatment subsided swelling, but the teeth loose. Out-patient examination: Zhang closed normal mouth movement, loosening Ⅲ °, OP pain (-), no caries, root end of the gingiva 0.3 × 0.3cm size of the flat nodular mass, the lump surface color was pale red, tenderness. In the clinic clamp lump biopsy, report “palatal malignancy”,