阑尾低级别黏液性肿瘤的CT表现  

CT imaging features of low-grade appendiceal mucinous neoplasm

作　　者：张瑜[1] 张广文[1] 刘会佳[1] 舒俊[1] 侯炜寰[1] 唐永强[1] 宦怡[1] 张劲松[1] ZHANG Yu;ZHANG Guang-wen;LIU Hui-jia(Department of Radiology,Xijing Hospital,Xi'an 710032,China)

机构地区：[1]西京医院放射科,西安710032

出　　处：《放射学实践》2019年第2期174-178,共5页Radiologic Practice

摘　　要：目的:探讨阑尾低级别黏液性肿瘤(LAMN)的CT表现。方法:回顾性分析经手术/穿刺病理证实的24例LAMN患者的影像及临床资料,总结其CT特征。15例行CT增强扫描,9例同时行CT平扫及增强扫描。结果:24例中21例表现为右髂窝、盆腔或结肠旁沟囊性肿块,3例呈右髂窝条状含气腔漂浮于液体中,其中2例形成腹盆腔巨大多房囊性病变。LAMN均表现为囊壁不均匀增厚且不光滑,病变长径/短径为1.60±0.56,囊壁厚度为(3.80±1.53) mm。囊性肿块CT值为(17.21±6.59) HU,高于膀胱内液体密度。9例边界局部欠清。7例囊壁连续性中断,9例见囊壁下薄层分隔影或囊壁"双边样"改变,19例囊壁钙化。10例腹盆腔积液,7例腹膜假黏液瘤(PMP)。囊壁轻度强化,周围未见淋巴结转移。结论:LAMN的CT表现有一定特征性,结合临床可做出较准确的诊断。Objective:To investigate the CT imaging features of low-grade appendiceal mucinous neoplasm(LAMN).Methods:The CT images and clinical data of 24 cases with LAMN proved by operation and pathology were reviewed retrospectively.All cases underwent contrast CT scans,and 9 underwent additional noncontrast CT scans.Results:Among the 24 cases with LAMN,21 appeared as cystic mass located in right iliac fossa,pelvic or paracolonic sulcus.The remaining 3 appeared as right iliac fossa with air-fluid level cavity,and 2 of them formed giant mutilocular cystic lesions.The cystic walls were all uneven thickening and non-smooth with mean thickness of(3.80±1.53)mm.The mean ratio of length to width was 1.60±0.56.The mean density of cystic fluid was(17.21±6.59)HU,which was higher than that of intravesical fluid.Nine was non-demarcated in margin and 7 showed wall interruption.Nine showed subcapsular thin septum or"double lines"signs.19 had calcification of cystic wall.Ten had abdominal and pelvic effusion,and 7 had peritoneal pseudomyxoma(PMP).The tumor showed mild enhancement of cystic wall without lymphadenopathy.Conclusion:LAMN demonstrated characteristic imaging appearances to some extent and may be accurately diagnosed in combination with clinic data.

关 键 词：阑尾肿瘤 低级别黏液性肿瘤 体层摄影术 X线计算机 

分 类 号：R735.36[医药卫生—肿瘤] R814.42[医药卫生—临床医学]