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目的:探讨阑尾黏液性肿瘤(AMN)n 18F-脱氧葡萄糖(FDG) PET/CT影像特征及PET/CT对AMN的诊断价值。n 方法:回顾性分析2013年4月至2019年5月于大连医科大学附属第一医院行PET/CT检查并经病理证实为AMN[低级别AMN(LAMN)及阑尾黏液腺癌(MAA)]的16例患者[男5例，女11例，年龄(59.6±12.2)岁]的资料，总结AMN的PET/CT图像特点，并分析LAMN与MAA间的差异，最后将显像结果与术后病理进行对照分析。采用两独立样本n t检验进行统计学比较。n 结果:PET/CT图像上，LAMN组较MAA组阑尾病灶具有更小的短径[(3.31±0.74)与(3.71±1.52) cm；n t＝-0.667，n P<0.05]、更低的囊壁代谢水平[最大标准摄取值(SUVn max)：2.73±1.31与6.70±5.95；n t＝-1.844，n P<0.05]。AMN多表现为阑尾区稍高密度[CT值：(23.88±13.14) HU]囊性灶，囊壁多伴点状钙化(10/16)，囊壁呈轻、中度增高代谢(SUVn max为4.71±4.64)，且多伴腹腔假性黏液瘤(PMP)转移(7/16)的特点。与病理结果对照，PET/CT术前准确诊断AMN 11例，其中AMN伴PMP形成3例，灵敏度分别为11/16和3/7；PET/CT术前准确诊断出9例转移瘤中的7例。n 结论:18F-FDG PET/CT检查对AMN具有良好的诊断价值。n “,”Objective:To investigate the n 18F-fluorodeoxyglucose (FDG) PET/CT imaging features of appendiceal mucinous neoplasms (AMN) and the diagnostic value of PET/CT for AMN.n Methods:Sixteen patients (5 males, 11 females, age: (59.6±12.2) years) with AMN who underwent n 18F-FDG PET/CT examination in the First Affiliated Hospital of Dalian Medical University between April 2013 and May 2019 were retrospectively analyzed. All AMN were divided into low-grade AMN (LAMN) group and mucinous appendiceal adenocarcinoma (MAA) group according to pathological results. The PET/CT imaging features were analyzed and compared between LAMN group and MAA group. The PET/CT imaging results were compared with histopathological results. Independent-sample n t test was used for data analysis.n Results:On PET/CT images, LAMN group showed shorter diameter ((3.31±0.74) n vs (3.71±1.52) cm; n t=-0.667, n P<0.05) and lower cystic wall metabolic level (maximum standardized uptake value (SUVn max): 2.73±1.31 n vs 6.70±5.95; n t=-1.844, n P<0.05) than those of MAA group. AMN usually showed slightly high density fluid ((23.88±13.14) HU) in the appendiceal region, punctate calcification (10/16) and low to moderate metabolism of the cystic wall (SUVn max: 4.71±4.64), and the pseudomyxoma peritonei incidence rate of AMN was about 7/16. Compared with the pathological results, PET/CT accurately diagnosed 11 cases of AMN, including 3 cases of AMN with pseudomyxoma peritonei, the sensitivity was 11/16, 3/7, respectively. PET/CT accurately diagnosed 7/9 patients with metastasis.n Conclusion:18F-FDG PET/CT examination has good diagnostic value for AMN.n