患者男,26岁。发现右颈部皮下无痛性结节7年余,并逐渐增大。体检:右耳周见不规则隆起结节或稍隆起的质硬斑块,大如蚕豆,小如米粒。皮肤表面无破损,无红肿热痛。MRI:右侧腮腺、耳后区见不规则片、团状异常信号,T1WI呈稍低信号,T2WI呈高信号,其内可见散在稍高信号结节,较大直径约 Male patient, 26 years old. Right subcutaneous painless nodules found more than 7 years, and gradually increased. Physical examination: see the right ear week irregular bulge nodules or slightly elevated hard plaque, as large as beans, small as rice. No damage to the skin surface, no swelling and heat pain. MRI: the parotid on the right, the posterior region of the ear see irregular film, abnormal signal mass, T1WI showed a slightly lower signal, T2WI was high signal, which can be seen scattered slightly higher signal nodules, larger diameter about