腮腺腺淋巴瘤的CT影像学分析

The Imaging Characteristic Analyses of CT of Adenolymphomas in the Parotid Gland

目的探讨腮腺腺淋巴瘤的CT影像学特点,以提高对本疾病的术前诊断水平。方法回顾性分析经手术后病理证实的18例腮腺腺淋巴瘤患者的CT影像学特点,分析病灶的数目、部位、形态、边界、密度、邻近结构关系及强化方式。结果18例患者共24个病灶,单发14例,多发4例;23个病灶位于腮腺浅叶,1个病灶呈跨叶生长;22个病灶位于腮腺后下极,2个病灶位于其他部位;23个病灶呈圆形或类圆形,1个病灶呈浅分叶状;22个病灶边界清楚,2个病灶边界模糊,邻近腮腺组织密度增高;17个病灶平扫密度均匀,7个病灶密度不均匀;增强扫描2个病灶轻度强化,9个病灶中度强化,13个病灶重度强化,病变内囊变区无强化;21个病灶见贴边血管征;所有患者颈部均无肿大淋巴结。结论腮腺腺淋巴瘤的CT影像学表现具有一定的特点,结合临床病史有助于术前对本疾病作出定性诊断。

Objective To discuss the imaging manifestations of CT of in the parotid gland , in order to improve the understanding of the CT imaging features of parotid adenolymphomas before operation. Methods The CT characteristics of 18 cases of ademolymphomas in the parotid gland confirmed by histological pathology were studied retrospectively. Results There were totally 24 lesions in 18 cases, of which 14 cases with unilateral lesions and 4 cases with bilateral lesions. 23 lesions were located in the superficial lobe of the parotid gland and one lesion involved the superfical and deep parotid lobe simultaneously. 22 lesions were located in posterior and inferior quadrant of parotid and 2 were other sites. 23 lesions were round or oval and 1 was lobulated in shape. The margins in 22 lesions were well-defined, 2 （8.3%） lesions were ill-defined with ipsilateral parotid gland were increased in density. The density of 17 lesions were homogeneous （solid） and 7 lesions were inhonmogeneous （cystosofid） on plain CT. 2 lesions showed slightly enhanced,9 lesions showed moderate enhancement , 13 lesions showed significant enhancement, and the cystic region within the lesions showed no enhancement. Small vessels could be seen in or around the tumor in 21 lesions and no enlarged cervical lymph node was noted. Conclusion There were some characteristics of CT in parotid adenolymphoma. Imaging characteristics combined with clinical materials can play a helpful role in the preoperative diagnosis of parotid adenolymphomas.