原发性回盲部淋巴瘤的CT表现

目的 探讨原发性回盲部淋巴瘤(PIL)的CT征象,以提高该疾病的CT诊断水平.方法 回顾性分析12例经手术病理证实的PIL的CT资料,所有患者均行CT平扫,其中8例加扫CT增强.结果 12例PIL中,肿块型2例,弥漫增厚型10例,病变肠管长约7.8~18.5 cm,平均约10.2 cm.9例病变肠腔不规则或瘤样扩张,3例明显狭窄;10例病变肠壁柔和,2例肠壁僵硬.CT平扫增厚肠管呈软组织密度影,8例增强扫描中,6例增厚肠管呈延迟均匀轻中度强化,2例见小片状坏死区;最大密度投影(MIP)示8例病变肠管均可见增粗肠系膜上动脉分支供血.9例病变肠管周围、肠系膜根部或腹膜后伴肿大淋巴结.1例并发肠梗阻,1例并发肠穿孔.结论 CT检查发现回盲部肠管呈均匀环形软组织肿块,且病变肠管范围较长,相应管腔扩张,管壁柔和,增强呈均匀轻中度延迟强化时,应考虑淋巴瘤可能.

CT features of primary ileocecum lymphoma

Objective To investigate CT features of primary ileocecum lymphoma (PIL),to improve the ability of CT diagnosis for the disease.Methods CT data of 12 patients with PIL confirmed by surgery and pathology were analyzed retrospectively.All of the patients underwent plain CT, and 8 cases of them also underwent enhanced CT.Results Among the 12 cases of PIL, there were mass type in 2 and diffused thickness type in 10.The length of the intestinal lesions ranged from 7.8 to 18.5 cm (mean 10.2 cm).Lumen was irregular or aneurysmal dilation in 9, and obvious stenosis in 3.Intestinal wall was soft in 10,and rigid in 2.Plain CT showed that the thickened intestinal wall was soft tissue density.Among the 8 cases performed enhanced CT,6 were approximately homogeneous enhancement, and 2 had small necrosis area without enhancement.Maximum intensity projection(MIP) displayed the lesion had blood supply from the branches of the superior mesenteric artery.Enlarged lymph nodes were detected around the lesions, in root of the mesentery, and in the retroperitoneum in 9.1 case was accompanied with intestinal obstruction,1 case was accompanied with intestinal perforation.Conclusion If CT examination found a homogeneous soft tissue mass in ileocecum with long extent, lumen dilation, soft intestinal wall,mild-to-moderate delayed homogeneous enhancement, PIL should be considered.