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Open Access 01-12-2021 | Cholangiocarcinoma | Research

Survival after surgery among patients with cholangiocarcinoma in Northeast Thailand according to anatomical and morphological classification

Authors: Chaiwat Tawarungruang, Narong Khuntikeo, Nittaya Chamadol, Vallop Laopaiboon, Jaruwan Thuanman, Kavin Thinkhamrop, Matthew Kelly, Bandit Thinkhamrop

Published in: BMC Cancer | Issue 1/2021

Abstract

Background

Cholangiocarcinoma (CCA) has been categorized based on tumor location as intrahepatic (ICCA), perihilar (PCCA) or distal (DCCA), and based on the morphology of the tumor of the bile duct as mass forming (MF), periductal infiltrating (PI) or intraductal (ID). To date, there is limited evidence available regarding the survival of CCA among these different anatomical and morphological classifications. This study aimed to evaluate the survival rate and median survival time after curative surgery among CCA patients according to their anatomical and morphological classifications, and to determine the association between these classifications and survival.

Methods

This study included CCA patients who underwent curative surgery from the Cholangiocarcinoma Screening and Care Program (CASCAP), Northeast Thailand. The anatomical and morphological classifications were based on pathological findings after surgery. Survival rates of CCA and median survival time since the date of CCA surgery and 95% confidence intervals (CI) were calculated. Multiple cox regression was performed to evaluate factors associated with survival which were quantified by hazard ratios (HR) and their 95% CIs.

Results

Of the 746 CCA patients, 514 had died at the completion of the study which constituted 15,643.6 person-months of data recordings. The incidence rate was 3.3 per 100 patients per month (95% CI: 3.0–3.6), with median survival time of 17.8 months (95% CI: 15.4–20.2), and 5-year survival rate of 24.6% (95% CI: 20.7–28.6). The longest median survival time was 21.8 months (95% CI: 16.3–27.3) while the highest 5-year survival rate of 34.8% (95% CI: 23.8–46.0) occurred in the DCCA group. A combination of anatomical and morphological classifications, PCCA+ID, was associated with the longest median survival time of 40.5 months (95% CI: 17.9–63.0) and the highest 5-year survival rate of 42.6% (95% CI: 25.4–58.9). The ICCA+MF combination was associated with survival (adjusted HR: 1.45; 95% CI: 1.01–2.09; P = 0.013) compared to ICCA+ID patients.

Conclusions

Among patients receiving surgical treatment, those with PCCA+ID had the highest 5-year survival rate, which was higher than in groups classified by only anatomical characteristics. Additionally, the patients with ICCA+MF tended to have unfavorable surgical outcomes. Showed the highest survival association. Therefore, further investigations into CCA imaging should focus on patients with a combination of anatomical and morphological classifications.

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Title: Survival after surgery among patients with cholangiocarcinoma in Northeast Thailand according to anatomical and morphological classification
Authors: Chaiwat Tawarungruang
Narong Khuntikeo
Nittaya Chamadol
Vallop Laopaiboon
Jaruwan Thuanman
Kavin Thinkhamrop
Matthew Kelly
Bandit Thinkhamrop
Publication date: 01-12-2021
Publisher: BioMed Central
Keywords: Cholangiocarcinoma
Cholangiocarcinoma
Published in: BMC Cancer / Issue 1/2021
Electronic ISSN: 1471-2407
DOI: https://doi.org/10.1186/s12885-021-08247-z

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