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A multi-center diagnostic system for intrahepatic mass-forming cholangiocarcinoma based on preoperative MRI and clinical features

  • Hepatobiliary-Pancreas
  • Published:
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Abstract

Objectives

To establish a non-invasive diagnostic system for intrahepatic mass-forming cholangiocarcinoma (IMCC) via decision tree analysis.

Methods

Totally 1008 patients with 504 pathologically confirmed IMCCs and proportional hepatocellular carcinomas (HCC) and combined hepatocellular cholangiocarcinomas (cHCC-CC) from multi-centers were retrospectively included (internal cohort n = 700, external cohort n = 308). Univariate and multivariate logistic regression analyses were applied to evaluate the independent clinical and MRI predictors for IMCC, and the selected features were used to develop a decision tree–based diagnostic system. Diagnostic efficacy of the established system was calculated by the receiver operating characteristic curve analysis in the internal training-testing and external validation cohorts, and also in small lesions  ≤ 3 cm.

Results

Multivariate analysis revealed that female, no chronic liver disease or cirrhosis, elevated carbohydrate antigen 19–9 (CA19-9) level, normal alpha-fetoprotein (AFP) level, lobulated tumor shape, progressive or persistent enhancement pattern, no enhancing tumor capsule, targetoid appearance, and liver surface retraction were independent characteristics favoring the diagnosis of IMCC over HCC or cHCC-CC (odds ratio = 3.273–25.00, p < 0.001 to p = 0.021). Among which enhancement pattern had the highest weight of 0.816. The diagnostic system incorporating significant characteristics above showed excellent performance in the internal training (area under the curve (AUC) 0.971), internal testing (AUC 0.956), and external validation (AUC 0.945) cohorts, as well as in small lesions  ≤ 3 cm (AUC 0.956).

Conclusions

In consideration of the great generalizability and clinical efficacy in multi-centers, the proposed diagnostic system may serve as a non-invasive, reliable, and easy-to-operate tool in IMCC diagnosis, providing an efficient approach to discriminate IMCC from other HCC-containing primary liver cancers.

Clinical relevance statement

This study established a non-invasive, easy-to-operate, and explainable decision tree–based diagnostic system for intrahepatic mass-forming cholangiocarcinoma, which may provide essential information for clinical decision-making.

Key Points

• Distinguishing intrahepatic mass-forming cholangiocarcinoma (IMCC) from other primary liver cancers is important for both treatment planning and outcome prediction.

• The MRI-based diagnostic system showed great performance with satisfying generalization ability in the diagnosis and discrimination of IMCC.

• The diagnostic system may serve as a non-invasive, easy-to-operate, and explainable tool in the diagnosis and risk stratification for IMCC.

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Abbreviations

AFP:

Alpha-fetoprotein

AUC:

Area under the curve

CA19-9:

Carbohydrate antigen 19-9

cHCC-CC:

Combined hepatocellular cholangiocarcinoma

CI:

Confidence interval

HCC:

Hepatocellular carcinoma

ICC:

Intrahepatic cholangiocarcinoma

IMCC:

Intrahepatic mass-forming cholangiocarcinoma

OR:

Odds ratio

T2W:

T2-weighted

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Acknowledgements

The authors thank the statistician Minzhi Lv for her support in statistical analyses in this work.

Funding

This study was funded by the Natural Science Foundation of Shanghai [grant number 23ZR1459500], the Natural Science Foundation of Fujian Province [grant number 2021D032], the Shanghai Municipal Key Clinical Specialty [grant number shslczdzk03202], and the National Natural Science Foundation of China [grant number 82171897].

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Correspondence to Jianjun Zhou or Mengsu Zeng.

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The scientific guarantor of this publication is Mengsu Zeng.

Conflict of interest

The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.

Statistics and biometry

The statistician Minzhi Lv kindly provided statistical advice for this manuscript.

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Written informed consent was waived by the Institutional Review Board.

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Institutional Review Board approval was obtained.

Study subjects or cohorts overlap

No.

Methodology

• retrospective

• diagnostic or prognostic study

• multi-center study

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Sheng, R., Zhang, Y., Wang, H. et al. A multi-center diagnostic system for intrahepatic mass-forming cholangiocarcinoma based on preoperative MRI and clinical features. Eur Radiol 34, 548–559 (2024). https://doi.org/10.1007/s00330-023-10002-w

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