Predictive value of metabolic 18FDG-PET response on outcomes in patients with locally advanced pancreatic carcinoma treated with definitive concurrent chemoradiotherapy

BMC Gastroenterology

Berrin Pehlivan³  Ali Fuat Yapar²  Ayşe Kotek¹  Cem Parlak¹  Erkan Topkan¹ 

[1] Baskent University Adana Medical Faculty, Department of Radiation Oncology, Adana, Turkey;Baskent University Adana Medical Faculty, Department of Nuclear Medicine, Adana, Turkey;Akdeniz University Medical Faculty, Department of Radiation Oncology, Antalya, Turkey

关键词: clinical outcome prediction;    positron emission tomography, metabolic response;    locally advanced pancreas cancer;    Concurrent chemoradiotherapy;   

Others  :  1113215
DOI  :  10.1186/1471-230X-11-123

 received in 2011-07-26, accepted in 2011-11-10,  发布年份 2011

【 摘 要 】

Background

We aimed to study the predictive value of combined 18F-fluoro-deoxy-D-glucose positron emission tomography and computerized tomography (FDG-PET-CT), on outcomes in locally advanced pancreatic carcinoma (LAPC) patients treated with concurrent chemoradiotherapy (C-CRT).

Methods

Thirty-two unresectable LAPC patients received 50.4 Gy (1.8 Gy/fr) of RT and concurrent 5-FU followed by 4 to 6 cycles of gemcitabine consolidation. Response was evaluated by FDG-PET-CT at post-C-CRT 12-week. Patients were stratified into two groups according to the median difference between pre- and post-treatment maximum standard uptake values (SUV_max) as an indicator of response for comparative analysis.

Results

At a median follow-up of 16.1 months, 16 (50.0%) patients experienced local/regional failures, 6 of which were detected on the first follow-up FDG-PET-CT. There were no marginal or isolated regional failures. Median pre- and post-treatment SUV_max and median difference were 14.5, 3.9, and -63.7%, respectively. Median overall survival (OS), progression-free survival (PFS), and local-regional progression-free survival (LRPFS) were 14.5, 7.3, and 10.3 months, respectively. Median OS, PFS, and LRPFS for those with greater (N = 16) versus lesser (N = 16) SUV_max change were 17.0 versus 9.8 (p = 0.001), 8.4 versus 3.8 (p = 0.005), and 12.3 versus 6.9 months (p = 0.02), respectively. On multivariate analysis, SUV_max difference was predictive of OS, PFS, and LRPFS, independent of existing covariates.

Conclusions

Significantly higher OS, PFS, and LRPFS in patients with greater SUV_max difference suggest that FDG-PET-CT-based metabolic response assessment is an independent predictor of clinical outcomes in LAPC patients treated with definitive C-CRT.

【 授权许可】

   
2011 Topkan et al; licensee BioMed Central Ltd.

【 图 表 】

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