恶性神经鞘瘤发生于颌面部少见,发生在上颌内国内、外未见有文献报道,现将我院收治1例报告如下: 患者女性,38岁。发现右上后龈颊沟一蚕豆大小无痛性包块1年余,无任何自觉症状,包块逐渐增大,曾在县医院就诊,疑为(?)根尖囊肿,给予(?)拔除。拔牙后包块迅速增大。经X线片检查:右上颌窦窦腔密度增高,内侧壁有一密度增高软组织影约1.5×2.5cm内侧 Malignant schwannomas occur rarely in the maxillofacial region, and no literature has been reported in the maxilla. Domestic and foreign cases have been reported in the hospital. One case reported in our hospital is reported as follows: The patient is female, 38 years old. Found that the right upper temporal cheek furrow beans a painless mass for more than one year, without any symptoms, mass gradually increased, once treated in the county hospital, suspected (?) Apical cyst, given (?) removed. The mass increases rapidly after tooth extraction. The X-ray examination: the density of the right maxillary sinus cavity increases, the inner wall has an increased density of soft tissue about 1.5 × 2.5cm inside