Related Experiment Video
Updated: May 22, 2026
Competing-Risk Nomogram for Predicting Cancer-Specific Survival in Multiple Primary Colorectal Cancer Patients after Surgery
Published on: September 27, 2024
Survival analysis and prognostic nomogram for patients undergoing resection of extrahepatic cholangiocarcinoma
N A van der Gaag1, J J Kloek1, J K de Bakker1
1Departments of Surgery, Amsterdam, The Netherlands.
Background:
Tumor location of extrahepatic cholangiocarcinoma (CCA) might influence survival after resection.
Methods:
A consecutive series of 175 patients who had undergone a potentially curative resection of extrahepatic CCA was analyzed. We calculated concordance indices of different constructed prognostic models for survival including TNM (tumour-node-metastasis) staging and developed a nomogram of the most sensitive model.
Results:
Overall cancer-specific survival rates were 83%, 58%, and 26% at 1, 2, and 5 years, respectively. Cancer-specific survival according to location was 42% for proximal, 23% for mid, and 19% for distal CCA after 5 years. Tumor location was not an independent significant predictor (P = 0.06). A prognostic model using all potential prognostic variables predicted survival better compared with TNM staging (concordance index 0.65 versus 0.63). A reduced model containing only lymph node status, microscopically residual tumor status, and tumor differentiation grade, also outperformed TNM staging (concordance index 0.66).
Conclusions:
Tumor location of extrahepatic CCA does not independently predict cancer-specific survival after resection. We developed a nomogram, based on a prognostic model with lymph node status, microscopically residual tumor status of resection margins, and tumor differentiation grade, that predicted survival better than TNM staging.
