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Purpose   We evaluated the prognostic value of preoperative  18 F-FDG uptake by suspected lymph nodes (LNs) using  18 F-FDG PET/CT in colorectal cancer patients.Methods   Patients with CRC underwent  18 F-FDG PET/CT before radical surgery. We used Cox proportional hazards regression to examine the relationship between recurrence and the  18 F-FDG maximum standardized uptake value (SUVmax) in the suspected LNs (SUV LN ) on  18 F-FDG PET/CT.Results   Clinical data, treatment modalities, and results from 90 CR C patients were reviewed. The median follow-up was 19 months (range 3 to 72 months). Receiver operating characteristic analysis identified SUV LN  1.15 was the optimal cut-off value for predicting recurrence. SUV LN  correlated with tumour size ( P =0.045), lymph node metastasis ( P =0.03), and recurrence ( P  < 0.0001). Univariate analysis showed significant associations between recurrence and SUV LN  ( P =0.017), and tumour grade ( P =0.013). Multivariate analysis identified SUV LN  ( P  < 0.0001), and tumour grade ( P =0.005) as independent risk factors for recurrence. Patients with SUV LN  ≤ 1.15 and SUV LN  > 0.15 differed significantly in terms of recurrence ( P  < 0.0001).Conclusion   Preoperative SUV LN  measured by  18 F-FDG PET/CT was significantly associated with recurrence and had significant prognostic value for recurrence-free survival in patients with colorectal cancer.

Preoperative PET/CT 18F-FDG Standardized Uptake by Lymph Nodes as a Significant Prognostic Factor in Patients with Colorectal Cancer

Preoperative PET/CT ¹⁸F-FDG Standardized Uptake by Lymph Nodes as a Significant Prognostic Factor in Patients with Colorectal Cancer