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Application of PET/CT to adjuvant chemotherapy for early lung adenocarcinoma
Journal of Cardiothoracic Surgery volume 10, Article number: A198 (2015)
Background/Introduction
The role of adjuvant chemotherapy for stage I lung cancer is unknown. Some Japanese trials demonstrated that tegaful-uracil chemotherapy improved the prognosis of stage I lung cancer over 2 cm.
Aims/Objectives
The purpose of this study is to determine the significance of the maximum standardized uptake value (SUVmax) on F-18-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) images to postoperative adjuvant chemotherapy for early lung adenocarcinoma.
Method
We reviewed 174 consecutive patients with completely resected pathological T1b-2aN0M0 lung adenocarcinoma between January 2006 and March 2011, and assessed recurrence-free interval and overall survival based on SUVmax values derived from preoperative FDG-PET/CT images. All patients were assessed by FDG-PET/CT before surgery
Results
Ninety patients received adjuvant chemotherapy and 84 did not. Patients given adjuvant chemotherapy were older, but had the lower T status tumor than patients who were not (both, p < 0.001). Adjuvant chemotherapy conferred benefits upon recurrence-free interval and overall survival compared with observation (p = 0.007 and p = 0.004, respectively). Multivariate Cox proportional hazard analyses revealed SUVmax as an independent prognostic factor for recurrence-free interval (hazard ratio 8.03, p < 0.001). Recurrence-free interval and overall survival were significantly longer for patients who received adjuvant chemotherapy compared with those who did not in the group with SUVmax ≤ 2.6 (p < 0.001 and p < 0.001, respectively). However, recurrence-free interval and overall survival did not significantly differ between such patients in the group with SUVmax < 2.6 (p = 0.421 and p = 0.452, respectively).
Discussion/Conclusion
Preoperative SUVmax on FDG-PET/CT images reflected the efficacy of postoperative adjuvant chemotherapy in patients with pathological T1b-2aN0M0 lung adenocarcinoma. Indications of adjuvant chemotherapy for eraly lung adenocarcinoma might be more precisely determined using SUVmax on FDG-PET/CT images together with tumor size.
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Sasada, S., Miyata, Y., Mimae, T. et al. Application of PET/CT to adjuvant chemotherapy for early lung adenocarcinoma. J Cardiothorac Surg 10, A198 (2015). https://doi.org/10.1186/1749-8090-10-S1-A198
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Keywords
- Lung Cancer
- Adenocarcinoma
- Prognostic Factor
- Tumor Size
- Adjuvant Chemotherapy