一、临床资料患者,男,16岁。因“发现右下颌牙龈肿块16年余”来本科就诊。患者出生后即被发现右侧下牙内侧牙龈有一肿块,色黑,粟粒大小,不影响哺乳及生长发育,未予诊治。随着年龄增长,肿块逐渐增大,如“板栗”大小,表面呈颗粒状隆起的肿物,颜色加深,无疼痛及瘙痒等不适。家族中无类似病史。 First, the clinical data patients, male, 16 years old. Because “found right lower jaw gum mass more than 16 years ” to undergraduate treatment. Patients were found after birth on the inside of the right side of the gums have a lump, color black, miliary size, does not affect breastfeeding and growth and development, no diagnosis and treatment. With age, the mass gradually increases, such as “chestnut ” size, the surface of the pelvic swelling of the tumor, darker, no pain and itching and other discomfort. No similar family history.