患者孙××,男,40岁。病案号为113575,病理号23439。患者于1989年初发现右侧上牙龈处长一蚕豆大肿物。4月间在沈阳某医院以“牙龈瘤”手术切除。术后3个月病灶处又长出一肿物,至住院前肿物已长有桃核大。1989年12月4日以“牙齦瘤”住院治疗。检查见21牙齿缺如,(?)牙龈处长一3×2.5×2cm肿物,质硬,不活动,靠近牙冠处肿物组织,触之易出血。术中见肿物深达上颌骨,上颌骨可见有腐蚀现象。肿物以基底附于 The patient Sun X, male, 40 years old. The case number is 113,575 and pathology number is 23,439. In early 1989, the patient discovered a large faba bean mass on the right upper gum. In April, a hospital in Shenyang was treated with a “gingival tumor.” At the third month after the operation, a tumor was formed at the lesion. Before the hospitalization, the tumor had a large peach kernel. On December 4, 1989, he was hospitalized with a “gingival tumor.” Check to see 21 lack of teeth, (?) Gum Department chief a 3 × 2.5 × 2cm tumor, hard, inactive, close to the crown at the tumor tissue, easy to touch the bleeding. During the operation, the tumor was as deep as the maxilla and the maxillary bone was corroded. Mass attached to base