18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像SUV与鼻咽癌预后的关系

目前关于PET／CT对鼻咽癌（NPC）诊断、分期和判断预后等方面的研究较多，然而鲜有报道其SUV与预后的关系，笔者现就此报道如下。     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-氟赤硝基咪唑PET-CT检测非小细胞肺癌乏氧的应用价值

Objective To assess the feasibility of [18F ] fluoroerythronitroimidazole (18F-FETNIM ) with integrated positron emission tomography and computed tomography (PET-CT) imaging in detection of hypoxia in non-small-cell lung cancer ( NSCLC) patients. Methods Forty-two patients with newly diagnosed NSCLC underwent 18F-FETNIM PET-CT before treatment. Nineteen patients rested for approximately 120 minutes before undergoing PET-CT,23 patients underwent 2 sequential PET-CT scans at 60 minutes and 120 minutes after intravenous injection 18F-FETNIM. 18F-FETNIM uptake was quantified by calculating the maximum standardized uptake value in the tumor (SUVmax-T) and contralateral normal lung tissue (SUVmax-N). Regions of interest (ROIs) were drawn in the tumor and contralateral position and the radioactivity ratio of tumor to normal (T/N) was calculated.Results SUVmax-T ( 2. 43 ± 1. 34) was significantly higher than SUVmax-N (0.87 ±0.46, P<0.001) at 120 min. SUVmax-T (2. 80 ± 1.09) and SUVmax-N (1. 16 ± 0. 56) at 60 min were significantly higher than SUVmax-T (2. 61 ± 1. 10) and SUVmax-N (P<0.01) at 120 min. T/N (2.56 ± 0.71) at 60 min was higher than that at 120 min (2.48 ± 0.60),but the difference between them was not significant (P =0.324). Conclusion Our results indicate that 18F-FETNIM PET-CT may be a useful tool for evaluating hypoxia and may be a means to target specifically tumor cells resistant to conventional treatment before and during ongoing therapy in NSCLC.     

18F-氟赤硝基咪唑PET-CT检测非小细胞肺癌乏氧的应用价值

目的 探讨静脉注射18F-氟赤硝基咪唑(18F-FETNIM)示踪剂后,应用PET-CT扫描检测非小细胞肺癌(NSCLC)患者肿瘤组织乏氧的状况.方法 42例经病理学证实且未经治疗的NSCLC患者,其中19例于静脉注射18F-FETNIM后120 min行单次PET-CT扫描;23例分别于注药后60、120 min后两次行PET-CT扫描.计算肿瘤组织内最大标准摄取值(SUVmax-T)和对侧肺组织相应区域内最大标准摄取值(SUVmax-N);计算靶与非靶比值(T/N),即肿瘤感兴趣区放射性计数与对侧肺组织相应区域放射性计数的比值.结果 注药后120 min时,SUVmax-T显著大于SUVmax-N(P<0.001).60 min时,SUVmax-T和SUVmax-N均显著高于120 min时的SUVmax-T和SUVmax-N(均P<0.01);60 min和120 min时的T/N比值差异无统计学意义(P=0.324).结论 18F-FETNIM PET-CT显像能在人体上对NSCLC的乏氧进行定量分析和空间位置的评价,能直接反映肿瘤组织乏氧程度和分布,为制定和实施个体化放射治疗及化疗提供依据.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

股直肌腱鞘巨细胞瘤18F-FDG PET/CT显像一例

患者男,47岁,胸中段食管癌术后放化疗半年,随访胸腹部CT(德国Siemens公司Sensation 16型)示腹腔内残胃左旁见一短径约1.5 cm淋巴结.为排除腹腔淋巴结转移并了解全身情况,行全身18F-FDG PET/CT(美国GE Discovery LS型)显像.患者静脉注射18F-FDG 344 MBq,静卧50 min后行PET/CT检查.显像结果(图1):食管癌术后,吻合口未见异常放射性摄取;腹腔内残胃左后下方示一长径约1.9cm的椭圆形软组织结节,边界清晰,未见异常放射性摄取;股骨头水平右侧缝匠肌后方示一长径约为1.7cm的略低密度结节,呈结节状放射性浓聚,SUVmax为6.9.患者体格检查局部未见明显阳性体征.MRI(德国Siemens 3.0 T型)示右股部缝匠肌后方肌间隙内平股骨头上方层面见一结节样异常信号影,T1WI呈低信号,T2WI压脂序列扫描信号略高.注射对比剂Gd-DTPA后呈轻中度边缘强化,大小约1.2 cm×1.8 cm×2.4 cm,边界较清晰(图2).行手术治疗,术中见股直肌腱鞘深面一类圆形肿物,大小约1.5 cm×2.0 cm×2.5 cm,包膜完整,表面光滑,与股直肌腱鞘分界不清.术后病理检查示:腱鞘巨细胞瘤(图3).     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

腹腔镜肾切除40例疗效观察

2003年6月至2004年9月,我们对40例患者行腹腔镜肾切除术,并与传统开放性肾切除术进行对比分析。现报告如下。临床资料：40例腹腔镜肾切除术患者为观察组．其中男22例,女18例;年龄18～65岁,平均45．8岁;肾恶性肿瘤30例．肾积水、感染所致无功能肾10例。40例开放肾切除术患者为对照组,其中男28例,女12例;年龄19～62岁,平均49．4岁;肾恶性肿瘤32例,肾积水、感染所致无功能肾8例。两组患者性别、年龄、患病情况差异无显著性。     

18F-FDG PET/CT显像监测卵巢癌术后复发转移的价值

目的:探讨PET/CT在监测卵巢癌术后复发、转移中的应用价值.方法:回顾性分析20例卵巢癌术后患者全身18F-FDG PET/CT显像结果,临床随访时间6～18个月.确诊依据为手术病理检查、穿刺活检、多种影像学检查和临床随诊.结果:20例患者中,13例(65%)患者最终确定有复发或转移,PET/CT诊断复发转移病例的灵敏度为100.0%,特异性为85.7%、准确性为95.0%.13例患者病理或随访确诊32处病灶, PET/CT共发现29处阳性病灶.PET/CT诊断复发或转移灶的灵敏度、特异性、准确率、阳性预测值及阴性预测值分别为84.3%(27/32)、81.8%(9/11)、83.7%(36/43)、93.1%(27/29)和64.2%(9/14).20例患者中,11例肿瘤标志CA125升高, 10例PET/CT检查显示复发或转移病灶,并经最终结果证实,1例血清CA125水平升高但PET/CT未检出转移灶,至随访结束未发现复发或转移.另有3例血清CA125水平正常,但PET/CT检查发现转移灶.结论:18F-FDG PET/CT检查诊断卵巢癌术后复发转移灵敏度、特异性和准确率较高,在卵巢癌术后监测中有重要作用.