患者，男性，维族，２３岁，采油厂职工，右颈部无痛性肿块１９年，明显增大５年。１９年前由其父母发现其颈部右上缘一黄豆大小肿块，随年龄逐渐增大，近５年来明显增大，在整个病程中无不适感，未曾就诊过。检查：颈部右侧胸锁乳突肌前上１３与下颌角之间可触及５×５．... The patient, male, Uyghur, 23 years old, an employee of an oil extraction plant, had a painless mass in the right neck for 19 years, which was significantly increased by 5 years. 19 years ago, his parents found that the size of a soybean lump on the right upper edge of the neck increased gradually with age, increased significantly in the past 5 years, no discomfort during the entire course of the disease, no treatment. Check: The right sternocleidomastoid muscle on the right side of the neck can reach 5×5 between the upper mandibular angle. ...