结节病18F-FDG PET/CT的诊断及误诊原因分析

目的 对行PET/CT检查的11例结节病患者进行回顾性分析,为结节病的正确诊断提供依据.方法 对11例经手术病理检查证实（5例）和随访证实（6例）的结节病患者进行回顾性临床资料总结,根据18F-脱氧葡萄糖（FDG）PET/CT图像特征,结合病灶累及部位、分布特点、大小、标准摄取值（SUV）特点及误诊比例等进行分析总结.结果 （1）淋巴结累及者共11例：其中纵隔及双肺门淋巴结累及者11例,锁骨上窝淋巴结累及者8例,腹膜后淋巴结累及者8例,盆腔淋巴结累及者3例.（2）结外脏器累及者共7例：包括肺内结节及片状阴影4例,肝累及2例,腮腺及颞肌累及1例,双侧髂骨和骶骨累及1例.（3）病灶大小：最大直径1.0～4.6 cm之间 病灶密度：CT平扫示病变淋巴结密度30～40 HU之间,肺内病灶呈淡薄密度影 肝内病灶呈等或稍低密度影.代谢情况：所有病灶代谢均明显增高者6例 部分病灶代谢明显增高、部分轻中度增高者2例 代谢均轻中度增高者3例.（4）PET/CT正确诊断6例 误诊5例,其中误诊为恶性淋巴瘤4例、肺癌1例.结论 18FFDG PET/CT可灵敏、准确地反映结节病的全身病灶分布范围和病灶活性,但部分病例易被误诊为恶性肿瘤,尤其是恶性淋巴瘤.根据PET/CT影像特点并结合临床能提高结节病的诊断准确性.     

结节病18F-FDG PET/CT的诊断及误诊原因分析

目的 对行PET/CT检查的11例结节病患者进行回顾性分析,为结节病的正确诊断提供依据.方法 对11例经手术病理检查证实(5例)和随访证实(6例)的结节病患者进行回顾性临床资料总结,根据18F-脱氧葡萄糖(FDG)PET/CT图像特征,结合病灶累及部位、分布特点、大小、标准摄取值(SUV)特点及误诊比例等进行分析总结.结果 (1)淋巴结累及者共11例:其中纵隔及双肺门淋巴结累及者11例,锁骨上窝淋巴结累及者8例,腹膜后淋巴结累及者8例,盆腔淋巴结累及者3例.(2)结外脏器累及者共7例:包括肺内结节及片状阴影4例,肝累及2例,腮腺及颞肌累及1例,双侧髂骨和骶骨累及1例.(3)病灶大小:最大直径1.0～4.6 cm之间;病灶密度:CT平扫示病变淋巴结密度30～40 HU之间,肺内病灶呈淡薄密度影;肝内病灶呈等或稍低密度影.代谢情况:所有病灶代谢均明显增高者6例;部分病灶代谢明显增高、部分轻中度增高者2例;代谢均轻中度增高者3例.(4)PET/CT正确诊断6例;误诊5例,其中误诊为恶性淋巴瘤4例、肺癌1例.结论 18FFDG PET/CT可灵敏、准确地反映结节病的全身病灶分布范围和病灶活性,但部分病例易被误诊为恶性肿瘤,尤其是恶性淋巴瘤.根据PET/CT影像特点并结合临床能提高结节病的诊断准确性.     

结节病18F-FDG PET显像分析

目的　探讨结节病1 8F 脱氧葡萄糖 (FDG)PET显像特征。方法　 2 4例结节病患者 ,其中有临床症状并经病理检查证实者 5例 ,无临床症状、结节病抗原 (Kveim)试验阳性者 19例。均有胸部CT检查结果。行1 8F FDGPET显像 ,经计算机重建获得冠状、横断、矢状断面图像 ,采用目视法观察病灶的部位和形态 ,计算标准摄取值 (SUV)。结果　目视法见 2 4例患者病灶均分布于双侧肺门和纵隔 ,呈结节形串珠状连接 ,其中 1例有症状患者还伴有左侧腋窝1 8F FDG摄取增高灶。 5例有症状患者 ,结节大小为 ( 2 .16± 0 .67)cm ,SUV为 2 .68± 0 .5 8;19例无症状患者 ,结节大小为 ( 1.5 5± 0 .2 1)cm ,SUV为 1.46± 0 .2 4,前者结节大小明显大于后者 (t =3 .5 4,P <0 .0 1) ,SUV明显高于后者 (t =7 3 8,P <0 .0 1)。 2 4例中CT检查仅发现 1例肺门及纵隔病变而提示为结节病。结论　病灶分布于双侧肺门和纵隔 ,呈结节形串珠状连接为结节病1 8F FDGPET显像特征。有临床症状者 ,结节病灶大小大于无临床症状者 ,1 8F FDG摄取亦高于无临床症状者     

18F-FDG PET/CT在孤立性肺结节和肿块中误诊原因分析

目的多中心回顾性分析18^F-FDG PET／CT对孤立性肺结节和肿块误诊的原因，以提高诊断准确性。方法从全国拥有PET／CT的10家医院筛选出已经获得病理检查结果的孤立性肺结节和肿块病例，收集18^F-FDG PET／CT检查结果、病理检查结果、SUV等资料。18^F-FDG PET／CT结果为肺癌、肺癌可能性大、肺癌可能者为阳性；结果为良性病变、良性可能性大、良性可能者为阴性。采用SPSS10．0软件对资料进行分析。结果共收集到经病理检查证实的孤立性肺结节和肿块患者资料226例，其中18^F-FDG PET／CT误诊27例（11．95％）。27例中误诊为恶性病变18例（66．67％），误诊为良性病变9例（33．33％）。误诊为恶性病变的18例中，病理检查证实炎症8例，结核5例，炎性假瘤4例，纵隔良性肿瘤1例，炎症、结核、炎性假瘤共17例；误诊为良性病变的9例中，病理检查证实中高分化腺癌6例（包括1例细支气管肺泡癌），中高分化鳞癌1例，低分化鳞癌和肺黏膜相关淋巴瘤各1例。11例病理检查为良性病变的SUVmean〉2．5，4例病理检查为恶性病变的SUVmean。〈2．5，良恶性病变的SUV有交叉。良性病变的平均SUVmax为7．2±5．5，平均SUVmean。为5．0±4．5；恶性病变的平均SUVmax为5．3±3．5，平均SUVmean为3．9±2．9，良、恶性病变的SUV差异无统计学意义。27例误诊患者中，年龄〈60岁者11例，其中10例误诊为恶性病变，仅1例误诊为良性病变。27例误诊中的2例，因为对CT形态学缺乏必要的认识而误诊为恶性病变。结论18^F-FDG PET／CT对孤立性肺结节和肿块误诊的原因主要是：（1）炎症、结核、炎性假瘤易误诊为恶性病变，中高分化的腺癌、鳞癌易误诊为良性病变；（2）良性病变和恶性病变的SUV有交叉，且差异无统计学意义；（3）18^F-FDG PET／CT对孤立性肺结节和肿块进行鉴别诊断时，年龄是重要的参考指标；（4）部分PET／CT专业医师对CT的形态学表现缺乏足够的认识。     

孤立性肺病变18F-FDG PET/CT显像诊断价值及误诊原因分析

目的 探讨18F-FDG PET/CT显像对孤立性肺病变的诊断价值及误诊原因.方法 回顾分析32例孤立性肺部病变患者18F-FDG PET/CT显像结果.将PET/CT结果与病理检查结果进行对比,评价18F-FDG PET/CT显像在孤立性肺部病变诊断中的价值,并分析其误诊原因.应用SPSS 16.0软件行统计学分析,SUVmax及SUVmax变化率(△SUVmax)与病灶直径大小关系采用Pearson相关分析.结果 32例孤立性肺部病变中,恶性病变22例,良性病变10例.18F-FDG PET/CT对68.75％( 22/32)患者进行了准确定性诊断.18F-FDG PET/CT显像假阴性5例,假阳性5例.22例肺部恶性病变中,6例恶性病变早期SUVmax ＜2.5,5例恶性病变△SUVmax＜15％.10例肺部良性病变中,2例良性病变早期SUVmax≥2.5,4例良性病变△SUVmax≥15％.良恶性病变SUVmax及△SUVmax有交叉.32例肺部病变中,孤立性肺部病变最大直径≤3 cm共26例,最大直径＞3 cm共6例,平均(1.98±1.08) cm.SUV max与病变直径大小呈正相关(r=0.690,P＜0.01),△SUVmax与病灶直径大小无相关性(r=-0.081,P＞0.05).结论 18F-FDG PET/CT在肺部孤立性病变定性诊断中有重要临床价值,但单纯依靠SUV max存在不足,应将PET与CT综合分析.     

33例肺良性病变的18F-FDG PET／CT误诊原因分析

目的：总结分析18F-脱氧葡萄糖（FDG）PET-CT对肺部良性病变的误诊原因,提高对良性病变形态学特征及显像特点的认识。方法：回顾性分析PET-CT误诊为恶性病变的33例肺部良性病变的PET-CT影像资料,对病灶大小、分布、边缘、密度、周围伴随征象等CT表现进行分析,统计良性病变放射性浓聚的病例数,并对不同病理类型病变的SU—Vmax进行比较。结果：结核易发生于上叶尖后段（10／23）及下叶背段（5／23）,真菌感染好发于下叶（3／3）。毛刺（15／33）及分叶征（12／33）常见,其中毛刺在炎性病变中多见（4／4）,晕征在真菌感染中多见（3／3）;胸膜牵拉是常见的伴随征象（7／33）。结核、真菌感染、良性肿瘤、炎性病变各组平均suVmax依次为5．54±4．18、4．63±1．28、6．23±1．32、2．07±1.44,组间差异无统计学意义（F=2．36,P=0．064）,其中25例发生18F—FDG放射性浓聚,包括结核18例,真菌感染及良性肿瘤各3例,炎性病变1例。在误诊的33例良性病例中,18例因具有恶性CT征象同时sUVmax≥2．5而作出诊断;8例仅因具有恶性CT征象而作出诊断;7例不具备典型的恶性CT征象,仅因SUVmax≥2．5作出诊断。结论：肺结核是最易误诊的肺部良性病变,误诊原因与不典型CT征象及FDG高代谢有关;正确认识不同性质良性病变的好发部位、特征性CT征象及放射性摄取特点对减少误诊有一定帮助。     

18F-FDG PET/CT对肾脏肿瘤的诊断价值

目的 探讨18F-FDG PET/CT对肾脏肿瘤的临床诊断价值.方法 回顾性分析近5年经18 F-FDG PET/CT诊断为肾脏肿瘤且病理或临床综合诊断明确的79例患者资料,其中男52例,女27例,平均年龄(57.3±14.1)岁.PET/CT诊断根据肾脏轮廓改变、病灶密度异常及FDG摄取程度做出.计算18F-FDG PET/CT诊断肾脏肿瘤的效能指标.结果 79例中恶性肿瘤70例(包括肾细胞癌40例、肾盂癌5例,淋巴瘤8例,转移瘤16例,肾筋膜囊脂肪肉瘤1例);良性肿瘤9例(包括血管平滑肌脂肪瘤7例,肾嗜酸细胞腺瘤1例,后肾腺瘤1例;不含小脂滴样错构瘤病例).18 F-FDG PET/CT对病灶检出率达97.5％(77/79),对肾脏良恶性病灶判断的灵敏度为92.9％ (65/70),特异性为7/9,准确性为91.1％ (72/79),阳性预测值为97.0％(65/67),阴性预测值为58.3％ (7/12).结论 18 F-FDG PET/CT能够检出并判断大部分肾脏占位病变性质,对肾脏肿瘤患者进行全身检查并做出综合评价是18F-FDG PET/CT的优势之一.     

18F-FDG PET/CT显像对小肠腺癌的诊断价值

目的 探讨18F-FDG PET/CT全身显像对小肠腺癌(SIA)的诊断价值.方法 回顾29例SIA(男17例,女12例)、21例小肠淋巴瘤(SIL;男15例,女6例)及10例小肠结核(SIT;男4例,女6例)的18F-FDG PET/CT显像资料,采用目测法和半定量方法(SUVmax)分析3种疾病PET/CT显像特点.计量资料差异比较用单因素方差分析,率的比较行x2检验.结果 (1) PET/CT图像上SIA多表现为小肠局部团块状、结节状高代谢灶,典型的SIL为小肠局部环形异常放射性浓聚灶,SIT多呈结节状、条状高代谢灶、病灶呈“跳跃性”分布;SIA的SUVmax为8.44±3.82,低于SIL(11.54±4.02; F=86.96,t=2.77,均P＜0.01),与SIT的8.61±2.99差异无统计学意义(t=0.11,P＞0.05).(2)SIA、SIL和SIT的灶周淋巴结肿大检出率分别为72.41％ (21/29)、85.71％(18/21)和70.00％ (7/10) (x2=1.50,P＞0.05);SIA的灶周肿大淋巴结SUVmax为5.59±2.86,明显低于SIL的11.10±5.72(F=56.56,t=3.85,均P＜0.01),与SIT的5.63±3.36差异无统计学意义(t=0.30,P＞0.05).PET/CT显像对SIA的灶周淋巴结肿大检出率明显高于CT(41.38％,12/29;x2=5.69,P＜0.05).(3)55.17％(16/29)的SIA有小肠外转移灶;66.67％(14/21)的SIL有小肠外病灶,以全身多发淋巴结浸润多见;80.00％(8/10)的SIT有腹腔外结核灶;三者小肠外病灶检出率差异无统计学意义(x2=2.13,P＞0.05).(4)29例SIA中15例(51.72％)累及回肠,8例(27.59％)累及空肠,4例(13.79％)空肠回肠同时受累,2例(6.90％)空肠十二指肠同时受累,病灶分布差异有统计学意义(x2=18.16,P＜0.01).(5)29例SIA中单原发癌8例(27.59％),转移性癌14例(48.28％),7例(24.14％)考虑为双原发癌.(6)以病理、诊断性治疗和临床随访结果为标准,18F-FDG PET/CT显像诊断SIA的灵敏度为93.10％(27/29),特异性为80.00％(8/10).结论 18F-FDG PET/CT全身显像可用于SIA的鉴别诊断,可为单原发、多原发及转移性SIA诊断提供依据.     

18F-FDG PET/CT对甲状腺结节性病变的诊断价值

目的 探讨18F-FDG PET/CT显像对于甲状腺结节性病变的诊断价值.方法 回顾性分析2008年1月至2012年5月18F-FDG PET/CT检查发现甲状腺结节性病变并有病理结果的34例患者资料,其中男13例,女21例,年龄21 ～ 73(53.00± 12.57)岁.选取20名2011年1月至2011年12月在PET/CT中心进行健康体格检查而甲状腺未发现异常者作为健康对照组,其中男9名,女11名,年龄40～55(45.00±4.72)岁.应用Wilcoxon秩和检验,分别对甲状腺良性病变和恶性病变组、良性病变和对照组及恶性病变和对照组的SUVmax进行分析,比较差异并对甲状腺结节长径行ROC曲线分析(AUC≥0.70为诊断准确性中～较高).甲状腺结节出现局限性异常放射性浓聚,而CT示病灶边界不清,内部密度不均,有点状、小圆形或弧形钙化,或同时颈部出现异常放射性浓聚的肿大淋巴结,远处器官出现可疑转移瘤者,PET/CT诊断为恶性.计算PET/CT诊断甲状腺恶性结节的效能指标.结果 (1)病理结果为恶性肿瘤18例,良性病变16例.甲状腺良、恶性组和健康对照组SUVmax分别为7.59±8.69、5.75±4.48和1.38±0.57.甲状腺良、恶性组SUVmax差异无统计学意义(u=0.207,P＞0.05),但两者与健康对照组比较差异均有统计学意义(u=3.408和3.553,均P＜0.01).(2)甲状腺良、恶性组SUVmax的ROC分析,AUC为0.557 (＜0.70),诊断准确性较低.(3)18F-FDG PET/CT诊断甲状腺良、恶性结节的灵敏度、特异性、阳性预测值、阴性预测值和准确性分别为72.2％(13/18)、75.0％(12/16)、76.5％(13/17)、70.6％(12/17)和73.5％ (25/34).结论 甲状腺结节单纯依据放射性摄取情况判断良恶性价值有限,但结合同机CT上的病灶形态学特点,18F-FDG PET/CT可以初步推测其良恶性,为临床提供客观信息.     

18F-FDG PET/CT在心脏肿瘤诊断中的临床应用

目的 研究18F-FDG PET/CT在心脏肿瘤诊断中的临床应用价值.方法 自2007年1月至2011年12月行全身18F-FDG PET/CT检查的8649例受检者中,诊断为心脏肿瘤者占0.16％(14/8649).对这14例患者进行回顾性分析,其中男11例,女3例;年龄46.9(35 ～68)岁.患者最终诊断以外科手术病理结果(5例)、肿瘤病史和临床随访结果(9例)为依据,分析18 F-FDG PET/CT诊断情况.结果 14例心脏肿瘤,18F-FDG PET/CT均作出准确定位和定性诊断.其中,转移性肿瘤11例,占78.6％ (11/14);原发恶性肿瘤2例,占14.3％ (2/14);原发良性黏液瘤1例,占7.1％ (1/14).11例转移性肿瘤的原发肿瘤分别为HCC(8例),肺癌(2例)和食管癌(1例).2例原发恶性肿瘤均发生转移.13例恶性肿瘤患者SUVmax为3.2 ～10.7,高于正常心肌.结论 全身18F-FDG PET/CT检查对心脏转移及原发肿瘤诊断有重要价值,可探查心脏恶性肿瘤全身转移情况,从而进行准确分期,指导临床治疗.     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

18F-FDG PET/CT显像诊断心包恶性病变的价值

Objective To assess the value of integrated 18 F-fluorodeoxyglucose (FDG) PET/CT in differentiation of malignant and benign pericardial effusion. Methods 18F-FDG PET/CT were performed in 23 patients with pericardial effusion. The detected soft tissue tumor or nodulous lession in pericardium or the thickened pericardium, with the maximum standardized uptake value( SUVmax ) ≥2.5, was defined as PET/CT-positive. The invaded lession in pericardium with SUVmax ≥2.5 was also as the positive. The difference of SUVmax of benign and malignant lesions was analyzed with two-independent-sample test of nonparametric tests. The final diagnosis was confirmed by biopsy or post-operative pathology. Results The diagnosis were confirmed with 14 malignant and 9 benign lesions. The median of SUVmax was 6.0 in malignancy group and 2.2 in benign group (z= -3. 279, P =0.001 ). According to the pathology results, there were one false negative case and two false positive cases with PET/CT imaging interpretation. The sensitivity, specificity,accuracy, positive predictive value ( PPV ) and negative predictive value ( NPV ) of 18 F-FDG PET/CT in diagnosis of benignity or malignance of pericardium effusion were 92.9% ( 13/14), 7/9, 87.0% (20/23),86.7% (13/15) and 7/8, respectively. Conclusion For the patients with pericardium effusion 18F-FDG PET/CT may be a helpful modality for malignancy differentiation     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.