腮腺腺淋巴瘤的临床和CT表现

The clinical and CT findings of adenolymphoma of the parotid gland

目的:探讨腮腺腺淋巴瘤的临床和CT表现特点。方法:回顾性分析10例经手术病理证实的腮腺腺淋巴瘤患者(均为老年男性)的临床和CT资料。结果:单侧病灶7例(其中2例各具2个病灶),双侧病灶3例(其中1例右侧2个病灶),共16个病灶。病灶较小、较局限12个,位于腮腺后下象限10个,位于前下象限2个;病灶较大累及腮腺多个象限4个。病灶呈圆形、椭圆形13个,呈分叶3个。病灶边缘清楚13个,其中3个可见边缘薄环状影与周围腮腺分隔;病灶边界不清3个,同时伴有同侧腮腺肿胀,密度增高。病灶大小0.6～4.8cm,平均(2.6±1.5)cm。病灶平扫密度较均匀,增强后12个病灶密度较均匀,4个病灶密度不均,内部可见无强化囊变区。平扫病灶CT值为(58.2±8.1)HU;动脉期(延迟30s)CT值平均为(89.1±18.7)HU,其中病灶轻度强化4个,中度强化7个,明显强化5个;静脉期(延迟90s)CT值平均为(92.6±16.8)HU。5个病灶(31.3%)内可见小血管进入或包绕。无颈部淋巴结肿大。结论:腮腺腺淋巴瘤的临床和CT表现均具备一定特点,仔细分析其临床及CT表现,多数能在术前做出正确的诊断。

Objective： To investigate the characteristics of clinical and CT findings of adenolymphomas of the parotid gland.Methods： The clinical and CT characteristics of 10 cases of adenolymphomas of the parotid gland confirmed by pathology were studied retrospectively.Results： Seven cases were found in unilateral side（2 cases each with 2 lesions）;bilateral side in 3 cases（1 case with 2 lesions in right side）,altogether 16 lesions.Twelve lesions were of small size,which 10 lesions located in lower posterior and 2 in lower anterior quadrant of the parotid gland;4 were of large size which involved multiple quadrants.Thirteen lesions were round or oval,3 were lobulated.Thirteen lesions were well-defined,a ring of interface could be seen between the lesion and the normal tissue in which 3 lesions;the margins in 3 lesions were ill-defined,with ipsilateral parotid gland swelling and were increased in density.Lesion size was 0.6~4.8cm[（2.6±1.5）cm].The density of the lesions were homogeneous on plain CT.Twelve were homogeneous and 4 were heterogeneous after enhancement.CT value of the lesion was（58.2±8.1）HU and（89.1±18.7）HU on plain CT and arterial phase（delayed 30s） after enhancement respectively.Four lesions were mildly,7 were moderately and 5 were significantly enhanced.CT value of venous phase（delayed 90s） of the lesions was（92.6±16.8）HU.Small vessels could be seen in or around the lesions in 5 cases（31.3%）.No enlarged cervical lymph node was noted.Conclusion： There were some characteristics of clinical and CT findings in the adenolymphomas of the parotid gland.Most cases could be correctly diagnosed before operation by analyzing the clinical and CT findings carefully.