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Published in: Insights into Imaging 1/2023

Open Access 01-12-2023 | Gastric Cancer | Original Article

Dual-layer spectral-detector CT for predicting microsatellite instability status and prognosis in locally advanced gastric cancer

Authors: Yongjian Zhu, Peng Wang, Bingzhi Wang, Zhichao Jiang, Ying Li, Jun Jiang, Yuxin Zhong, Liyan Xue, Liming Jiang

Published in: Insights into Imaging | Issue 1/2023

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Abstract

Objective

To construct and validate a prediction model based on dual-layer detector spectral CT (DLCT) and clinico-radiologic features to predict the microsatellite instability (MSI) status of gastric cancer (GC) and to explore the relationship between the prediction results and patient prognosis.

Methods

A total of 264 GC patients who underwent preoperative DLCT examination were randomly allocated into the training set (n = 187) and validation set (n = 80). Clinico-radiologic features and DLCT parameters were used to build the clinical and DLCT model through multivariate logistic regression analysis. A combined DLCT parameter (CDLCT) was constructed to predict MSI. A combined prediction model was constructed using multivariate logistic regression analysis by integrating the significant clinico-radiologic features and CDLCT. The Kaplan–Meier survival analysis was used to explore the prognostic significant of the prediction results of the combined model.

Results

In this study, there were 70 (26.52%) MSI-high (MSI-H) GC patients. Tumor location and CT_N staging were independent risk factors for MSI-H. In the validation set, the area under the curve (AUC) of the clinical model and DLCT model for predicting MSI status was 0.721 and 0.837, respectively. The combined model achieved a high prediction efficacy in the validation set, with AUC, sensitivity, and specificity of 0.879, 78.95%, and 75.4%, respectively. Survival analysis demonstrated that the combined model could stratify GC patients according to recurrence-free survival (p = 0.010).

Conclusion

The combined model provides an efficient tool for predicting the MSI status of GC noninvasively and tumor recurrence risk stratification after surgery.

Critical relevance statement

MSI is an important molecular subtype in gastric cancer (GC). But MSI can only be evaluated using biopsy or postoperative tumor tissues. Our study developed a combined model based on DLCT which could effectively predict MSI preoperatively. Our result also showed that the combined model could stratify patients according to recurrence-free survival. It may be valuable for clinicians in choosing appropriate treatment strategies to avoid tumor recurrence and predicting clinical prognosis in GC.

Key points

• Tumor location and CT_N staging were independent predictors for MSI-H in GC.
• Quantitative DLCT parameters showed potential in predicting MSI status in GC.
• The combined model integrating clinico-radiologic features and CDLCT could improve the predictive performance.
• The prediction results could stratify the risk of tumor recurrence after surgery.

Graphical Abstract

Appendix
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Literature
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go back to reference Bartley AN, Mills AM, Konnick E et al (2022) Mismatch repair and microsatellite instability testing for immune checkpoint inhibitor therapy: guideline from the College of American Pathologists in Collaboration With the Association for Molecular Pathology and Fight Colorectal Cancer. Arch Pathol Lab Med 146:1194–1210. https://doi.org/10.5858/arpa.2021-0632-CPCrossRefPubMed Bartley AN, Mills AM, Konnick E et al (2022) Mismatch repair and microsatellite instability testing for immune checkpoint inhibitor therapy: guideline from the College of American Pathologists in Collaboration With the Association for Molecular Pathology and Fight Colorectal Cancer. Arch Pathol Lab Med 146:1194–1210. https://​doi.​org/​10.​5858/​arpa.​2021-0632-CPCrossRefPubMed
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Metadata
Title
Dual-layer spectral-detector CT for predicting microsatellite instability status and prognosis in locally advanced gastric cancer
Authors
Yongjian Zhu
Peng Wang
Bingzhi Wang
Zhichao Jiang
Ying Li
Jun Jiang
Yuxin Zhong
Liyan Xue
Liming Jiang
Publication date
01-12-2023
Publisher
Springer Vienna
Published in
Insights into Imaging / Issue 1/2023
Electronic ISSN: 1869-4101
DOI
https://doi.org/10.1186/s13244-023-01490-x

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