4.2 Article

Metabolic tumor volume predicts long-term survival after transplantation for unresectable colorectal liver metastases: 15 years of experience from the SECA study

Journal

ANNALS OF NUCLEAR MEDICINE
Volume 36, Issue 12, Pages 1073-1081

Publisher

SPRINGER
DOI: 10.1007/s12149-022-01796-8

Keywords

F-18-FDG PET; CT; Metabolic tumor volume; Colorectal cancer; Liver transplantation; Liver metastases

Funding

  1. Vestre Viken Hospital Trust
  2. Oslo University Hospital
  3. Norwegian Cancer Society

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This study reports 15 years of experience with using metabolic tumor volume (MTV) of liver metastases to predict long-term survival after liver transplantation for unresectable colorectal liver metastases. The results show that patients with low MTV have better overall survival, disease-free survival, and post-recurrence survival.
Objective To report 15 years of experience with metabolic tumor volume (MTV) of liver metastases from the preoperative F-18-FDG PET/CT to predict long-term survival after liver transplantation (LT) for unresectable colorectal liver metastases (CRLM). Methods The preoperative F-18-FDG PET/CT from all SECA 1 and 2 patients was evaluated. MTV was obtained from all liver metastases. The patients were divided into one group with low MTV (< 70 cm(3)) and one group with high MTV (> 70 cm(3)) based on a receiver operating characteristic analysis. Overall survival (OS), disease-free survival (DFS) and post recurrence survival (PRS) for patients with low versus high MTV were compared using the Kaplan-Meier method and log rank test. Clinopathological features between the two groups were compared by a nonparametric Mann-Whitney U test for continuous and Fishers exact test for categorical data. Results At total of 40 patients were included. Patients with low MTV had significantly longer OS (p < 0.001), DFS (p < 0.001) and PRS (p = 0.006) compared to patients with high values. The patients with high MTV had higher CEA levels, number of liver metastases, size of the largest liver metastasis, N-stage, number of chemotherapy lines and more frequently progression of disease at LT compared to the patients with low MTV. Conclusion MTV of liver metastases is highly predictive of long-term OS, DFS and PRS after LT for unresectable CRLM and should be implemented in risk stratification prior to LT.

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