患儿,女,4岁。3月前偶见左下颌无痛性肿胀,缓慢生长。拍片后以“左下颌骨囊肿?”入院。 查体:一般检查无异常,四肢长骨未触及膨胀,结节。右下颌嚼肌前膨隆,约2cm×2cm大小固定包块,皮温不高,无触压痛。开口不受限,颊侧膨隆,有乒乓球样感。 Children, female, 4 years old. Occasionally, the left lower jaw was painlessly swollen 3 months ago and grew slowly. After the film was taken, “Left mandibular cyst?” was admitted. Physical examination: No abnormalities were observed on the general examination, and the long bones of the limbs did not touch the inflated nodules. Right jaw chewing muscle before ectasia, about 2cm × 2cm size fixed mass, skin temperature is not high, no touch tenderness. The opening is not limited, the buccal bulging, there is a sense of table tennis.