Published in:
01-02-2015 | Original Article
Prognostic value of volumetric parameters of 18F-FDG PET in non-small-cell lung cancer: a meta-analysis
Authors:
Hyung-Jun Im, Kyoungjune Pak, Gi Jeong Cheon, Keon Wook Kang, Seong-Jang Kim, In-Joo Kim, June-Key Chung, E. Edmund Kim, Dong Soo Lee
Published in:
European Journal of Nuclear Medicine and Molecular Imaging
|
Issue 2/2015
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Abstract
Purpose
We conducted a comprehensive systematic review of the literature on volumetric parameters from 18F-FDG PET and a meta-analysis of the prognostic value of metabolic tumour volume (MTV) and total lesion glycolysis (TLG) in patients with lung cancer.
Methods
A systematic search of MEDLINE and EMBASE was performed using the keywords “positron emission tomography (PET)”, “lung cancer”, and “volume”. Inclusion criteria were: 18F-FDG PET used as an initial imaging tool; studies limited to non-small-cell lung cancer (NSCLC); volume measurement of lung cancer; patients who had not undergone surgery, chemotherapy, or radiotherapy before the PET scan; and studies that reported survival data. Event-free survival and overall survival were evaluated as outcomes. The impact of MTV and TLG on survival was measured in terms of the hazard ratio (HR) effect size. Data from each study were analysed using Review Manager 5.2.
Results
Thirteen eligible studies including 1,581 patients were analysed. Patients with high MTV showed a worse prognosis with an HR of 2.71 (95 % CI 1.82 – 4.02, p < 0.00001) for adverse events and an HR of 2.31 (95 % CI 1.54 – 3.47, p < 0.00001) for death. Patients with high TLG also showed a worse prognosis with an HR of 2.35 (95 % CI 1.91 – 2.89, p < 0.00001) for adverse events and an HR of 2.43 (95 % CI 1.89 – 3.11, p < 0.00001) for death. The prognostic value of MTV and TLG remained significant in a subgroup analysis according to TNM stage as well as the methods for defining cut-off values and tumour delineation.
Conclusion
Volumetric parameters from 18F-FDG PET are significant prognostic factors for outcome in patients with NSCLC. Patients with a high MTV or TLG are at higher risk of adverse events and death. MTV and TLG were significant prognostic factors in patients with TNM stage I/II and stage III/IV NSCLC.