腮腺基底细胞腺瘤的CT与MRI表现

目的:探讨腮腺基底细胞腺瘤(BCA)的CT和MRI表现。方法:回顾性分析10例腮腺BCA的CT和MRI表现。10例中男3例,女7例;右侧腮腺4例,左侧6例。结果:10例肿瘤均为单发,肿瘤最长径平均为2.4cm。10例肿瘤中不规则形或深分叶状2例,圆形或类圆形8例;边缘均光滑清楚。MRI检查2例,表现为长T1、短T2信号实性肿块,伴稍低信号包膜,增强扫描后病灶呈均匀明显强化。CT检查8例:6例呈实性,2例呈囊实性、内有大片液化囊变,实性部分明显强化。结论:腮腺BCA的CT和MRI表现有一定特征,结合临床,有助于本病的诊断和鉴别诊断。

CT and MRI findings of basal cell adenoma of the parotid gland

Objective： To study the CT and MRI features of basal cell adenoma of the parotid gland. Methods： CT（ n =8） and MRI（ n =2） findings of 10 cases with pathologically-proved basal cell adenoma of the parotid gland were retrospectively ana-lyzed. Results： Each of the ten patients had only one lesion. The maximum diameter of tumor was averagely 2.4 cm. Eight tumors presented as round or oval masses without obviously lobular appearance and two as irregular or deeply lobular mass. All the ten tumors had well-defined margin. On Tl-weighted MR imaging, the tumors were homogeneously hypointense to the sur-rounding parotid tissue and isointense to muscle. On T2-weighted imaging, the tumors were homogeneously hyperintense to muscle but slightly hypointense to the surrounding parotid tissue. On enhanced Tl-weighted imaging, the two tumors demon-strated obvious homogeneously enhancement. On CT scan, there were 6 solid masses and 2 cystic-solid masses. After contrast administration,the solid component of the lesions showed prominent enhancement. Conclusion： Basal cell adenoma of the parot- id gland has its CT and MRI characteristics. Associated with clinic data, CT and MRI are helpful in the diagnosis and differen-tial diagnosis of parotid gland basal cell adenoma.