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Tumor fibrosis correlates with the survival of patients with pancreatic adenocarcinoma and is predictable using clinicoradiological features

  • Gastrointestinal
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Abstract

Objectives

To evaluate the prognostic value of fibrosis for patients with pancreatic adenocarcinoma (PDAC) and preoperatively predict fibrosis using clinicoradiological features. Tumor fibrosis plays an important role in the chemoresistance of PDAC. However, the prognostic value of tumor fibrosis remains contradiction and accurate prediction of tumor fibrosis is required.

Methods

The study included 131 patients with PDAC who underwent first-line surgery. The prognostic value of fibrosis and rounded cutoff fibrosis points for median overall survival (OS) and disease-free survival (DFS) were determined using Cox regression and receiver operating characteristic (ROC) analyses. Then the whole cohort was randomly divided into training (n = 88) and validation (n = 43) sets. Binary logistic regression analysis was performed to select independent risk factors for fibrosis in the training set, and a nomogram was constructed. Nomogram performance was assessed using a calibration curve and decision curve analysis (DCA).

Results

Hazard ratios of fibrosis for OS and DFS were 1.121 (95% confidence interval [CI]: 1.082–1.161) and 1.110 (95% CI: 1.067–1.155). ROC analysis identified 40% as the rounded cutoff fibrosis point for median OS and DFS. Tumor diameter, carbohydrate antigen 19-9 level, and peripancreatic tumor infiltration were independent risk factors; areas under the nomogram curve were 0.810 and 0.804 in the training and validation sets, respectively. The calibration curve indicated good agreement of the nomogram, and DCA demonstrated good clinical usefulness.

Conclusions

Tumor fibrosis was associated with poor OS and DFS in patients with PDAC. The nomogram incorporating clinicoradiological features was useful for preoperatively predicting tumor fibrosis.

Key Points

Tumor fibrosis is correlated with poor prognosis in patients with pancreatic adenocarcinoma.

Tumor fibrosis can be categorized according to its association with overall survival and disease-free survival.

A nomogram incorporating carbohydrate antigen 19-9 level, tumor diameter, and peripancreatic tumor infiltration is useful for preoperatively predicting tumor fibrosis.

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Abbreviations

AUC:

Area under the curve

CI:

Confidence interval

CPA:

Collagen proportional area

DCA:

Decision curve analysis

DFS:

Disease-free survival

ICC:

Interclass correlation coefficient

OS:

Overall survival

PDAC:

Pancreatic ductal adenocarcinoma

PTI:

Peripancreatic tumor infiltration

ROC:

Receiver operating characteristic

TA:

CT attenuation values at pancreatic phase of tumor

TN:

CT attenuation values at non-enhanced phase of tumor

TV:

CT attenuation values at portal vein phase of tumor

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Acknowledgements

The authors thank Zhuochen Lin for his statistical suggestions.

Funding

This study was supported in part by the National Natural Science Foundation of China (Grant Number 81771908, 81971684).

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Authors

Corresponding authors

Correspondence to Zhenpeng Peng or Shi-Ting Feng.

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Guarantor

The scientific guarantor of this publication is Shi-Ting Feng from Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University.

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

Zhuochen Lin kindly provided statistical advice for this manuscript.

Informed consent

Written informed consent was waived by the Institutional Review Board.

Ethical approval

Institutional Review Board approval was obtained.

Methodology

• retrospective

• prognostic study

• performed at one institution

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Shi, S., Luo, Y., Wang, M. et al. Tumor fibrosis correlates with the survival of patients with pancreatic adenocarcinoma and is predictable using clinicoradiological features. Eur Radiol 32, 6314–6326 (2022). https://doi.org/10.1007/s00330-022-08745-z

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  • DOI: https://doi.org/10.1007/s00330-022-08745-z

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