颌骨组织外发生的造釉细胞瘤称为外周性造釉细胞瘤(peripheral amelobasfome),少见。1993年初我们收治一例由牙龈组织发生的造釉细胞瘤,因此瘤在临床上易与其他肿瘤混淆而误诊,现将该病例报道如下: 患者李××,女,35岁,左下颌2—5舌侧牙龈无痛性肿物二年。1991年初诊时肿物如花生米大小,于国外(印尼)由一牙医生切除(未做病理检查),但半年后该 Ameloblastoma occurring outside of the jaw tissue is called peripheral amelobasfome and is rare. In early 1993 we treated a case of ameloblastoma arising from the gingival tissue, so the tumor is easily confused with other tumors in the clinic and is misdiagnosed, the case is now reported as follows: Patient Lee × ×, female, 35 years old, left mandible 2-5 Lingual gum painless two years. When first diagnosed in 1991, the size of the tumor, such as peanut, was excised by a dentist (not pathologically examined) in a foreign country (Indonesia), but after six months