腮腺腺淋巴瘤的多排螺旋CT表现特点

Characteristics of parotid gland lymphoma observed by multi-slice spiral CT

目的:探讨腮腺腺淋巴瘤的多排螺旋CT表现特点。方法:对我院经手术病理证实的18例腮腺腺淋巴瘤患者的临床和CT图像资料进行总结分析,所有病例均行CT平扫和增强。结果:男16例,女2例;平均年龄58.7岁,在50岁以上者14例。单侧发病15例,双侧发病3例,共23个病灶;位于腮腺后下象限16个,非后下象限7个;呈类圆形17个,圆形5个,有明显分叶状1个;平均最大径为2.4cm;境界均清晰光整;密度均匀16个,密度不均伴囊变坏死区7个,CT值为16.2～43.5Hu。增强扫描早期病灶明显强化18个,中度强化5个,CT值上升平均值为(50.3±15.8)Hu;均匀强化16个,不均匀强化7个;延迟期病灶密度迅速降低21个,缓慢降低2个。结论:腮腺腺淋巴瘤好发于50岁以上男性,多位于腮腺后下象限,CT平扫病灶边界清楚光整,呈均匀或者不均匀稍高密度,增强扫描多明显强化,呈"快进快出"特点。

Objective To evaluate the characteristics of parotid gland lymphoma observed by multi-slice spiral CT. Methods Clinical and CT image data of 18 patients with parotid gland lymphoma which were pathologically confirmed in our hospital were analyzed, all patients received CT scan and enhanced scan. Results Among the 18 patients, 16 were males, 2 were females; the average age was 58.7 years, and 14 patients over the age of 50. Fifteen patients with unilateral lymphoma, and 3 patients with bilateral lymphoma, all accounted to a total of 23 lesions. Among all the 23 lesions, 16 located in the following quadrant, 7 located in the following non-inferior quadrant; 17 were similarly round, 5 were round, and 1 was obviously lobulated; the average maximum diameter was 2.4 em and the boundaries were clear finishing. The density of 16 lesions were uniform, 7 lesions were uneven with cystic necrosis, and the CT value was 16.2 - 43.5 Hu. Enhanced scan showed that 18 lesions were significantly enhanced early, 5 lesions were moderately enhanced, and the CT values were increased by an average of （50.3 ＋- 15.8）Hu; 16 lesions were homogeneous enhanced, and 7 lesions were heterogeneous enhanced; latency period showed that the density of 21 lesions were decreased rapidly, 21 lesions were slowly lowered. Conclusions Parotid gland lymphoma was mostly occurred in people over the age of 50, the lesions were mostly located under the quadrant in the parotid gland, with clear boundaries under CT scan, even or uneven slightly density, significantly enhanced under enhanced scan, and ＂fast-forward faster ＂ features.