^18F-FDG PET/CT对可疑复发性宫颈癌的临床价值

目的 探讨^18F-FDG PET/CT在可疑复发性宫颈癌临床诊疗中的价值.方法 回顾性分析51例宫颈癌根治后随访期间临床可疑复发的患者,记录患者的治疗资料、可疑复发表现、18F-FDG PET/CT显像结果、同期常规影像检查结果、病理及临床随访结果、PET/CT结果对临床诊疗的影响.结果 PET/CT诊断宫颈癌复发43例,最终经病理检查及临床随访证实复发性宫颈癌40例,盆腔脓肿2例,放射性肠炎1例;PET/CT未见恶性征象8例,病理检查及临床随访均未见异常.PET/CT诊断复发性宫颈癌灵敏度为100.00%（40/40）,特异性为72.73%（8/11）,准确性为94.12%（48/51）.PET/CT指导制订临床诊疗及随访计划34例,改变治疗计划7例.与其他影像检查相比,PET/CT可发现更多的病灶.结论^18F-FDG PET/CT能有效诊断复发性宫颈癌,指导临床诊疗.     

18F-FDG PET/CT显像在治疗后宫颈癌评估中的价值

目的 探讨18F-FDG PET/CT对临床怀疑宫颈癌局部复发和(或)远处转移患者的诊断价值.方法 回顾性分析95例宫颈癌治疗后患者的18F-FDG PET/CT检查资料,采用视觉分析和半定量方法(SUVmax)分析病灶特点,最终诊断以活组织病理检查、诊断性治疗及影像学随访结果为准,采用Kappa一致性检验进行分析.结果 共有54例患者18 F-FDG PET/CT检查发现局部复发和(或)远处转移病灶,其中局部复发24例,远处转移30例;18F-FDG PET/CT诊断肿瘤复发与转移的灵敏度、特异性和准确性分别为98.1％(52/53)、95.2％ (40/42)和96.8％ (92/95),阳性预测值与阴性预测值分别为96.3％ (52/54)和97.6％(40/41).18F-FDG PET/CT检查结果与病理及临床随访结果一致性良好(Kappa=0.936,P＜0.05).结论 18F-FDG PET/CT对临床可疑宫颈癌复发的诊断具有较高的灵敏度和特异性,有助于局部复发和(或)远处转移病灶的检测,对临床进一步的诊疗具有指导作用.     

18F-FDG PET/CT在宫颈癌治疗后鳞状细胞癌抗原升高患者中的应用价值

目的 探讨18F-FDG PET/CT在宫颈癌治疗后鳞状细胞癌(简称鳞癌,SCC)抗原水平升高、临床怀疑宫颈癌残余、复发及转移患者中的诊断价值.方法 回顾性分析2009年3月至2012年10月间进行了PET/CT检查、临床资料齐全的宫颈鳞癌治疗后患者48例[平均年龄(47.5±11.2)岁].患者均为在末次治疗后3 ～ 24个月的随访期内首次出现SCC抗原水平升高(＞1.5 μg/L)者,以病理及临床随访结果为最后诊断标准,评价18 F-FDG PET/CT诊断这些患者肿瘤残余、复发及转移的效能.采用两独立样本t检验比较SUVmax差异.结果 48例患者末次治疗后首次异常SCC抗原水平为1.6～42.5(8.6±9.4)μg/L.经病理及随访证实有残余、复发或转移的患者45例,占93.75％(45/48).18F-FDG PET/CT及其他影像检查发现的174个病灶中被证实为残余、复发及转移灶者169个,18F-FDG PET/CT正确诊断159个,诊断的灵敏度为94.08％(159/169),准确性为91.38％ (159/174).18F-FDG PET/CT对宫颈癌残余及复发病灶诊断灵敏度和准确性均为9/10,对淋巴结转移灶诊断灵敏度为94.59％(105/111),准确性为92.92％(105/113);对其他部位转移灶诊断灵敏度为93.75％(45/48),准确性为88.24％(45/51).残余及复发病灶的SUVmax为6.9-±3.8(2.0～13.7),转移病灶相应值为6.3±2.7(2.0～ 14.4),两者间差异无统计学意义(t=0.629,P＞0.05).结论 18F-FDG PET/CT可准确判断宫颈癌残余、复发及转移灶,在宫颈癌治疗后随访出现SCC抗原水平升高的患者中具有重要应用价值.     

18F-FDG PET/CT影像辅助CT引导下经皮穿刺活组织检查术的临床应用

目的 评价一日法18F-脱氧葡萄糖(FIX;)PET/CT全身扫描联合18F-FDG PET/CT影像辅助CT引导下经皮穿刺活组织检查术用于恶性实体肿瘤分期与定性诊断的临床价值.方法 16例实体占位病变患者,全部行一日内全身18F-FDG PET/CT扫描结合18F-FDG PET/CT影像辅助CY引导下经皮穿刺活组织检查术.每例患者的2种检查均在同一台PET/CT扫描仪上完成.共获18份适合病理分析的标本.分别以活组织检查标本结合外科术后病理检查,或临床随访结果为依据,建立最后诊断.采用SPSS 13.0软件,对2种检查结果进行比较(Fisher精确概率法).结果 16例患者中,最后诊断恶性12例,良性4例.有10例18F-FDG;PET/CT影像诊断与穿刺活组织病理检查结果一致.10例18F-FDG PET/CT诊断为恶性病变者中,最终诊断为恶性8例,良性2例.6例18F-FDGPET/CT诊断为良性者中,最终诊断为良性2例,恶性4例.穿刺活组织检查结果与最后手术病理检查和随访诊断结果全部符合.PET/CT影像诊断与穿刺活组织检查结果之间差异无统计学意义(P=0.604).所有最后诊断为恶性实体肿瘤的患者,定性与分期在一日内完成;诊断为良性者则规定门诊长期随访,排除假阴性.穿刺获取组织学标本时间为平均每例15 min.该组病例均无严重并发症发生.结论 全身18F-FDG PET/CT扫描联合18F-FDG PET/CT影像辅助CT引导下经皮穿刺活组织检查术,有助于提高PET/CT诊断效能与穿刺活组织检查的成功率与准确性.当18F-FDG PET/CT影像诊断出现定性困难时,其价值尤为明显.     

18F-FDG PET/CT在宫颈癌诊断中的应用

目的 探讨18F-脱氧葡萄糖(FDG) PET/CT在宫颈癌诊断及其复发、转移灶探测中的应用价值.方法 88例患者行腹部或全身18F-FDG PET/CT显像,其中初诊者30例(宫颈良性病变11例,宫颈癌19例),宫颈癌治疗后58例.病灶根据病理检查、多种影像诊断技术及临床随访确诊,随访时间均为6个月～3年.结果 30例初诊者中,PET/CT诊断宫颈癌的灵敏度、特异性和准确性分别为17/19,10/11和27/30(90.0%).58例治疗后患者中,11例存在肿瘤复发或残余,PET/CT诊断肿瘤复发、残余的灵敏度、特异性和准确性分别为10/11,47/47(100.0%)和57/58(98.3%).41例有肿瘤转移,PET/CT诊断转移灶的灵敏度、特异性和准确性分别为92.7%,88.9%和90.9%;转移灶以盆腹腔淋巴结为主,39.0%有盆腔淋巴结转移,27.3%有腹膜后淋巴结转移,所有淋巴结转移患者中PET/CT发现26.8%病灶直径＜1.0cm.28.6%(22/77)的患者PET/CT发现腹腔外远处转移灶.18例输尿管梗阻患者中,16例PET/CT发现为肿瘤侵犯压迫所致.结论 18F-FDG PET/CT显像在宫颈癌的诊断及其复发、转移灶探测中有良好的应用价值,尤其是对远处转移灶和小淋巴结转移灶的检测,可使临床分期更准确.     

18F-FDG PET/CT显像在宫颈癌术后复发和转移中的应用价值

目的 探讨18F-FDG PET/CT显像在宫颈癌术后复发和转移中的应用价值.方法 搜集临床可疑宫颈癌术后复发和转移患者65例,年龄23～77岁,平均48.7岁.所有宫颈癌患者均经手术病理确诊并行根治性治疗,其中鳞癌47例,腺癌12例,腺鳞癌4例,透明细胞癌1例,小细胞癌1例.患者均行18F-FDG PET/CT全身显像检查,采用目测法和半定量法判断结果,并与组织病理或临床随访结果比较其诊断的准确性,以及评价其诊断的真实性和可靠性.结果 65例患者经组织病理或临床随访证实50例复发和转移.18F-FDG PET/CT显像诊断肿瘤局部复发18例,肿瘤转移33例,复发和转移病灶的SUVmax 2.91 ～ 16.70,平均SUVmax 9.81,18F-FDG PET/CT显像诊断宫颈癌术后复发和转移的灵敏度为98.00％,特异性为86.67％,准确性为95.38％,阳性预测值为96.08％,阴性预测值为92.86％;18F-FDG PET/CT显像诊断结果与组织病理或临床随访结果比较差异无统计学意义(经x2检验,P＞0.05);二者结果的吻合度有统计学意义且吻合度较强(系数k=0.867,P=0.000).结论 18F-FDG PET/CT显像能够准确、直观地显示宫颈癌术后复发和转移,且真实性和可靠性好;同时18F-FDG PET/CT全身显像检查是肿瘤远处转移探测最有效的方法,可较全面评估患者病情,对协助临床确定个体化治疗方案具有重要价值.     

18F-FDG PET/CT在黑色素瘤中的应用价值

目的 探讨18F-脱氧葡萄糖(FDG)PET/CT显像在黑色素瘤诊断、临床分期及监测治疗后肿瘤复发与转移灶中的应用价值.方法 黑色素瘤患者61例,均进行18F-FDG PET/CT全身显像.所有PET、CT及PET/CT融合图像均通过融合软件进行帧对帧对比分析.肿瘤病灶根据病理学检查、多种影像学检查及临床随访结果诊断.结果 18F-FDG PET/CT显像对黑色素瘤病灶检出的灵敏度、特异性和准确性分别为90.9%(40/44)、88.2%(15/17)和90.2%(55/61).其中12例治疗前患者中,18F-FDG PET/CT显像诊断的灵敏度为83.3%(10/12).在黑色素瘤病灶局部切除、尚未进行其他治疗的9例患者中,5例残余病灶18F-FDG PET/CT显像检出3例;4例远处转移灶患者全被检出,提高了临床分期,改变了治疗方案.首先发现转移性黑色素瘤病灶并且手术切除后,寻找原发灶的7例患者中,18F-FDG PET/CT检出原发灶2例,4例其他转移灶全被检出.黑色素瘤患者根治术后监测肿瘤复发或转移患者33例,18F-FDG PET/CT显像灵敏度、特异性和准确性分别为100.0%(19/19)、85.7%(12/14)和93.9%(31/33).与同期临床其他影像学检查比较,18F-FDG PET/CT显像发现更多,33例患者中,16例(48.5%)病灶提高临床分期;7例(21.2%)排除可疑病灶,降低临床分期;10例(30.3%)检出病灶与临床一致.结论 18F-FDG PET/CT显像对于黑色素瘤的诊断,残余病灶、复发病灶及转移灶的检出,临床分期的明确具有重要价值.     

18F-FDG PET/CT在可疑神经系统副肿瘤综合征中的应用价值

目的 探讨18F-脱氧葡萄糖（FDG）PET/CT显像探测临床可疑神经系统副肿瘤综合征（PNS）患者潜在肿瘤病灶的应用价值.方法 回顾性分析20例可疑PNS患者18F-FDG PET/CT显像资料,对所有患者行随访病理检查或临床最终诊断,并将结果与PET/CT显像和随访结果进行比较.结果 20例中PET/CT显像发现可疑恶性病变或既往肿瘤复发和（或）转移者9例,阴性11例.9例阳性者中3例为假阳性.PET/CT显像对PNS恶性肿瘤检出的灵敏度、特异性、准确性、阳性预测值和阴性预测值分别为6/6,78.57%（11/14）,85.00%（17/20）,6/9和100.00%（11/11）.6例真阳性中4例治疗方案得以修正,经抗肿瘤和免疫疗法后神经异常症状得到改善.结论 18F-FDG PET/CT显像在可疑PNS中的应用有积极意义,有助于发现恶性肿瘤,也能对肿瘤分期提供帮助.     

18F-FDG PET/CT在可疑神经系统副肿瘤综合征中的应用价值

目的 探讨18F-脱氧葡萄糖(FDG)PET/CT显像探测临床可疑神经系统副肿瘤综合征(PNS)患者潜在肿瘤病灶的应用价值.方法 回顾性分析20例可疑PNS患者18F-FDG PET/CT显像资料,对所有患者行随访病理检查或临床最终诊断,并将结果与PET/CT显像和随访结果进行比较.结果 20例中PET/CT显像发现可疑恶性病变或既往肿瘤复发和(或)转移者9例,阴性11例.9例阳性者中3例为假阳性.PET/CT显像对PNS恶性肿瘤检出的灵敏度、特异性、准确性、阳性预测值和阴性预测值分别为6/6,78.57%(11/14),85.00%(17/20),6/9和100.00%(11/11).6例真阳性中4例治疗方案得以修正,经抗肿瘤和免疫疗法后神经异常症状得到改善.结论 18F-FDG PET/CT显像在可疑PNS中的应用有积极意义,有助于发现恶性肿瘤,也能对肿瘤分期提供帮助.     

18F-FDG PET/CT在可疑神经系统副肿瘤综合征中的应用价值

目的 探讨18F-脱氧葡萄糖(FDG)PET/CT显像探测临床可疑神经系统副肿瘤综合征(PNS)患者潜在肿瘤病灶的应用价值.方法 回顾性分析20例可疑PNS患者18F-FDG PET/CT显像资料,对所有患者行随访病理检查或临床最终诊断,并将结果与PET/CT显像和随访结果进行比较.结果 20例中PET/CT显像发现可疑恶性病变或既往肿瘤复发和(或)转移者9例,阴性11例.9例阳性者中3例为假阳性.PET/CT显像对PNS恶性肿瘤检出的灵敏度、特异性、准确性、阳性预测值和阴性预测值分别为6/6,78.57%(11/14),85.00%(17/20),6/9和100.00%(11/11).6例真阳性中4例治疗方案得以修正,经抗肿瘤和免疫疗法后神经异常症状得到改善.结论 18F-FDG PET/CT显像在可疑PNS中的应用有积极意义,有助于发现恶性肿瘤,也能对肿瘤分期提供帮助.     

Clinical and survival impact of FDG PET in patients with suspicion of recurrent cervical carcinoma

Purpose

The aim of this retrospective study was to evaluate the contribution of ¹⁸F-FDG PET to the clinical management and survival outcome of patients suspected of recurrent cervical carcinoma and in line with the hypothesis that early diagnosis of recurrent cervical cancer may improve overall survival.

Methods

A total of 40 patients underwent conventional imaging (CI) and FDG PET/CT for suspected cervical cancer. Clinical management decisions were recorded with CI and additional PET/CT. Discordances and concordances between CI and PET/CT results were compared to the final diagnosis as based on histopathology analysis or follow-up considered as the gold standard.

Results

The final diagnosis was established pathologically (n?=?25) or by median clinical follow-up for 48 months after the PET (n?=?15). The PET/CT was positive in 76% (20/26) of patients compared to 19% (6/26) with CI. Globally PET/CT modified the treatment plan in 55% (22/40) of patients and in 75% (18/24) when the CI was negative prior to PET/CT. These changes led to the use of previously unplanned therapeutic procedures in 37.5% (15/40). When FDG PET was positive for recurrence (>?3 foci), the median overall survival was 12 months (2–70) compared to patients with PET findings with ≤?1 focus for which the median survival was not attained (p?=?0.007). A multivariate analysis of prognostic factors demonstrated that abnormal FDG uptake (>?3 foci) was the most significant factor (p?<?0.03) for death from cervical cancer.

Conclusion

FDG PET is a valuable tool in the case of suspected recurrence of cervical cancer on account of its impact on treatment planning and especially in predicting patient outcome.     

Breast cancer staging in a single session: whole-body PET/CT mammography

Our objective was to compare the diagnostic accuracy of an all-in-one protocol of whole-body 18F-FDG PET/CT and integrated 18F-FDG PET/CT mammography with the diagnostic accuracy of a multimodality algorithm for initial breast cancer staging. METHODS: Forty women (mean age, 58.3 y; range, 30.8-78.4 y; SD, 12 y) with suspected breast cancer were included. For the primary tumor, we compared 18F-FDG PET/CT mammography versus MRI mammography; for axillary lymph node status, 18F-FDG PET/CT versus clinical investigation and ultrasound; and for distant metastases, 18F-FDG PET/CT versus a multimodality staging algorithm. Histopathology and clinical follow-up served as the standard of reference. The Fisher exact test evaluated the significance of differences (P < 0.05). Alterations in patient management caused by 18F-FDG PET/CT were documented. RESULTS: No significant differences were found in the detection rate of breast cancer lesions (18F-FDG PET/CT, 95%; MRI, 100%; P = 1). 18F-FDG PET/CT correctly classified lesion focality significantly more often than did MRI (18F-FDG PET/CT, 79%; MRI, 73%; P < 0.001). MRI correctly defined the T stage significantly more often than did 18F-FDG PET/CT (MRI, 77%; 18F-FDG PET/CT, 54%; P = 0.001). 18F-FDG PET/CT detected axillary lymph node metastases in 80% of cases; clinical investigation/ultrasound, in 70%. This difference was not statistically significant (P = 0.067). Distant metastases were detected with 18F-FDG PET/CT in 100% of cases, and the multimodality algorithm identified distant metastases in 70%. This difference was not statistically significant (P = 1). Three patients had extraaxillary lymph node metastases that were detected only by PET/CT (cervical, retroperitoneal, mediastinal/internal mammary group). 18F-FDG PET/CT changed patient management in 12.5% of cases. CONCLUSION: Our data suggest that a whole-body 18F-FDG PET/CT mammography protocol may be used for staging breast cancer in a single session. This initial assessment of the 18F-FDG PET/CT protocol indicates similar accuracy to MRI for the detection of breast cancer lesions. Although MRI seems to be more accurate when assessing the T stage of the tumor, 18F-FDG PET/CT seems able to more accurately define lesion focality. Although 18F-FDG PET/CT mammography was able to detect axillary lymph node metastases with a high sensitivity, this method cannot soon be expected to replace the combination of clinical examination, ultrasound, and sentinel lymph node biopsy for axillary assessment.     

18F-FDG PET/CT全身显像在原发灶不明转移癌中的临床应用

目的 探讨18F-脱氧葡萄糖(FDG)PET/CT全身显像在原发灶不明转移癌(CUP)诊断中的临床应用价值.方法 回顾性分析2006年1月至2007年6月2589例18F-FDG PET/CT显像患者中169例CUP患者的显像结果,通过分析病历记录、病理检查结果及临床随访确定最终原发灶诊断结果.结果 169例CUP患者中19例失访,150例有完整资料.70例成功探测到原发灶,总检出率为46.7%(70/150),其中52例得到病理检查证实,18例为临床诊断;肺癌38例,占54.3%,鼻咽癌8例,占11.4%,消化系统肿瘤13例,占18.6%,其他肿瘤11例,占15.7%.3例临床怀疑转移瘤,18F-FDG PET/CT未见明显恶性征象,经随访证实为良性病变.6例PET/CT诊断错误.15例患者没有确诊.56例未探测到原发灶,其中3例在随访过程中得到确诊,分别为鼻咽癌、膀胱癌、食管癌各1例.结论 18F-FDG PET/CT全身显像对诊断CUP具有重要临床价值.     

Is 18F-FDG PET/CT useful for imaging and management of patients with suspected occult recurrence of cancer?

Rising serum tumor markers may be associated with negative imaging in the presence of cancer. CT and (18)F-FDG PET may yield incongruent results in the assessment of tumor recurrence. The present study evaluates the incremental role of (18)F-FDG PET/CT for the diagnosis and management of cancer patients with increasing levels of tumor markers as the sole indicator of potential recurrence after initial successful treatment. METHODS: Thirty-six cancer patients with increasing levels of tumor markers during follow-up and negative CT underwent (18)F-FDG PET/CT, which showed 111 sites of increased tracer uptake. PET/CT was compared with PET results on a site-based analysis for characterization of (18)F-FDG foci and on a patient-based analysis for diagnosis of recurrence. The clinical impact of PET/CT on further patient management was evaluated. RESULTS: Thirty patients (83%) had recurrence in 85 malignant sites (77%). For the site-based analysis, PET had a sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of 96%, 50%, 85%, 85%, and 82%, respectively, as compared with the performance indices of PET/CT of 100%, 89%, 97%, 97%, and 100%, respectively. There was a statistically significant difference between the specificity (P < 0.05) and accuracy (P < 0.001) of PET and PET/CT for precise characterization of suspected lesions. For the patient-based analysis, PET had a sensitivity, specificity, and accuracy of 93%, 50%, and 86%, respectively, as compared with PET/CT with values of 93%, 67%, and 89%, respectively (P = not significant). PET/CT was the single modality that directed further management and treatment planning in 12 patients (33%). CONCLUSION: The results of this study indicate that PET/CT may improve the accuracy of occult cancer detection and further lead to management changes in patients with increasing levels of tumor markers as the sole suspicion of recurrent malignancy.     

PET/CT using 18F-FDG in suspected lung cancer recurrence: diagnostic value and impact on patient management.

The goal of this study was to assess the value of hybrid imaging using a combined PET/CT device with 18F-FDG in the diagnosis and clinical management of suspected recurrent lung cancer. METHODS: Forty-two patients with non-small cell lung cancer (NSCLC) with suspected recurrence due to new clinical, biochemical, and radiologic findings were prospectively evaluated. PET/CT results were compared with PET interpreted with side-by-side CT data. A final diagnosis of recurrence was confirmed by histologic tissue sampling during surgery or biopsy or by further clinical and radiologic work-up. The impact of PET/CT on patient management was assessed. RESULTS: Twenty-four of 27 positive PET/CT studies (89%) were proven to have recurrent disease. Fourteen of 15 negative PET/CT studies (93%) had no evidence of disease. The sensitivity, specificity, and positive and negative predictive values of PET/CT for diagnosis of recurrence were 96%, 82%, 89%, and 93% compared with 96%, 53%, 75%, and 90%, respectively, for PET. PET/CT changed the PET lesion classification in 22 patients (52%), by determining the precise localization of sites of increased 18F-FDG uptake. PET/CT changed the management of 12 patients (29%) by eliminating previously planned diagnostic procedures (5 patients), by initiating a previously unplanned treatment option (4 patients), or by inducing a change in the planned therapeutic approach (3 patients). CONCLUSION: In patients with a suspected recurrence of NSCLC, PET/CT provides a better anatomic localization of suspicious lesions compared with PET interpreted with side-by-side CT data. This improved diagnostic performance of PET/CT has a further impact on the clinical management and treatment planning of the patients.     

18F-FDG PET/CT in patients with suspected recurrent or metastatic well-differentiated thyroid cancer.

PET using 18F-FDG has been shown to effectively detect various types of cancer by their increased glucose metabolism. The aim of this study was to evaluate the use of coregistered PET and CT (PET/CT) in patients with suspected thyroid cancer recurrence. METHODS: After total thyroidectomy followed by radioiodine ablation, 61 consecutive patients with elevated thyroglobulin levels or a clinical suspicion of recurrent disease underwent 18F-FDG PET/CT. Of these, 59 patients had negative findings on radioiodine (131I) whole-body scintigraphy (WBS). Fifty-three of the 61 patients had both negative 131I WBS findings and elevated thyroglobulin levels. PET/CT images were acquired 60 min after intravenous injection of 400-610 MBq of 18F-FDG using a combined PET/CT scanner. Any increased 18F-FDG uptake was compared with the coregistered CT image to differentiate physiologic from pathologic tracer uptake. 18F-FDG PET/CT findings were correlated with the findings of histology, postradioiodine WBS, ultrasound, or clinical follow-up serving as a reference. The diagnostic accuracy of 18F-FDG PET/CT was evaluated for the entire patient group and for those patients with serum thyroglobulin levels of less than 5, 5-10, and more than 10 ng/mL. RESULTS: Thirty patients had positive findings on 18F-FDG PET/CT; 26 were true-positive and 4 were false-positive. In 2 patients, increased 18F-FDG uptake identified a second primary malignancy. 18F-FDG PET/CT results were true-negative in 19 patients and false-negative in 12 patients. The overall sensitivity, specificity, and accuracy of 18F-FDG PET/CT were 68.4%, 82.4%, and 73.8%, respectively. The sensitivities of 18F-FDG PET/CT at serum thyroglobulin levels of less than 5, 5-10, and more than 10 ng/mL were 60%, 63%, and 72%, respectively. Clinical management changed for 27 (44%) of 61 patients, including surgery, radiation therapy, or chemotherapy. CONCLUSION: Coregistered 18F-FDG PET/CT can provide precise anatomic localization of recurrent or metastatic thyroid carcinoma, leading to improved diagnostic accuracy, and can guide therapeutic management. In addition, the findings of this study suggest that further assessment of 131I WBS-negative, thyroglobulin-positive patients by 18F-FDG PET/CT may aid in the clinical management of selected cases regardless of the thyroglobulin level.     

18F-FDG PET-CT诊断前列腺癌复发与转移的价值

目的 探讨18F-FDG PET-CT在前列腺癌复发、转移诊断中的价值.方法 回顾性分析23例前列腺癌治疗后随访期间临床怀疑复发、转移患者的18F-FDG显像资料,同期常规显像检查结果,病理及临床随访结果.结果 经病理及临床随访结果证实前列腺癌复发、转移者19例.PET-CT诊断为阳性者20例,其中1例盆腔脓肿、5例前...     

Detection of early recurrence with 18F-FDG PET in patients with cervical cancer.

This study investigated the feasibility of PET with (18)F-FDG to evaluate retrospectively early recurrence in patients with cervical cancer. METHODS: From September 1997 to March 2000, 249 patients with no evidence of cervical cancer after treatment were investigated with (18)F-FDG PET. (18)F-FDG PET scanning, beginning 50 min after injection of 370-555 MBq (18)F-FDG, was performed. (18)F-FDG uptake other than physiologic uptake was evaluated with the standardized uptake value and was analyzed by 2 observers who were unaware of CT or MRI data. CT or MRI and needle biopsies were performed to evaluate the positive lesions on (18)F-FDG PET, and all patients were monitored closely for 6 mo for recurrence. RESULTS: Of the 249 patients, 80 patients (32.1%) showed positive lesions with (18)F-FDG PET, and 28 patients (11.2%) were clinically or histologically confirmed as having recurrences. Eighty-two percent of recurrence was detected within 6-18 mo after diagnosis, and 89% of recurrence occurred in Fédération Internationale de Gynécologie et d'Obstétrique (FIGO) stage IIb and stage III patients. The sensitivity and specificity of (18)F-FDG PET for detection of early recurrence were 90.3% and 76.1%, respectively. The sensitivity of (18)F-FDG PET was high in mediastinal, hilar, and scalene lymph nodes, spine, and liver; however, the sensitivity was relatively low in lung, retrovesical lymph nodes, and paraaortic lymph nodes. Three false-negative cases were detected in lung, retrovesical lymph nodes, and paraaortic lymph nodes. CONCLUSION: (18)F-FDG PET was effective in detecting early recurrences in cervical cancer patients with no evidence of disease. (18)F-FDG PET may be a useful follow-up method for cervical cancer, thereby providing the patients with early opportunities for sophisticated treatments.