Razavi Journal of Medicine

Razavi Journal of Medicine

Artificial Intelligence and Radiomics for Detection, Segmentation, and Biomarker Prediction in Gastrointestinal Cancers

Document Type : Review Article/ Systematic Review Article/ Meta Analysis

Authors
1 Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
2 Healthy Ageing Research Centre, Neyshabur University of Medical Sciences, Neyshabur, Iran
3 Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran.
4 College of Medicine, University of Warith Al-Anbiyaa, Karbala 56001, Iraq.
Abstract
Background: Early diagnosis of gastrointestinal (GI) cancers remains challenging because of the heterogeneity of imaging modalities and clinical manifestations and the absence of specific symptoms. Artificial intelligence (AI), deep learning, and radiomics can enhance image interpretation, automate tumor segmentation, and identify clinically relevant imaging biomarkers.

Objectives: This narrative review aimed to summarize recent advances in AI- and radiomics-based imaging of colorectal, gastric, liver, and pancreatic cancers, focusing on tumor detection, segmentation, staging, histological classification, molecular biomarker prediction, and prognostic evaluation.

Materials and Methods: A structured, topic-focused search of PubMed/MEDLINE and Google Scholar was conducted without a lower publication-date limit and was last updated on 30 July 2026. English-language human studies evaluating AI- or radiomics-based computed tomography (CT), magnetic resonance imaging, or positron emission tomography applications were considered. Studies with external validation, multicenter designs, or larger cohorts, as well as systematic reviews and meta-analyses, were prioritized, and methodological robustness was appraised qualitatively.

Results: In colorectal cancer, AI-based methods have been developed for preoperative staging, prediction of Kirsten rat sarcoma viral oncogene homolog (KRAS) mutation and microsatellite instability, lesion segmentation, and survival estimation. In gastric cancer, deep learning and radiomics have been applied to cancer detection on noncontrast CT, cross-center three-dimensional tumor segmentation, and preoperative histological type prediction. Liver cancer studies have mostly focused on automated lesion segmentation and radiomics-based prediction of clinically relevant biomarkers such as vessels encapsulating tumor clusters. In pancreatic cancer, multimodal and attention-based models have been used for three-dimensional and small-tumor segmentation and for prediagnostic detection of pancreatic ductal adenocarcinoma. Although several models achieved high area-under-the-curve or Dice values, direct comparisons are limited by heterogeneity in populations, imaging protocols, model architectures, performance metrics, and validation strategies. Much of the evidence remains retrospective and is often based on single-center or selected datasets with limited external validation.

Conclusions: AI and radiomics show potential as decision-support tools in GI cancer imaging. Before clinical application, prospective multicenter evaluation, standardized imaging and reporting practices, and improved accessibility and integration into routine radiology workflows are required.
Keywords
Subjects

Funding: This work was supported by the National Institute for Medical Research Development (Grant No. 4002286 to Amir Avan).

 

Data availability: Not applicable.


Conflicts of Interest: The authors have no relevant financial or non-financial interests to disclose.


Ethics Approval: Not applicable.



Consent for Publication: Not applicable.


Author Contributions Statement: N.H., M.A., and R.R. contributed to Writing – Original Draft and Writing – Review & Editing. N.H., M.A., and A.Y.K. were responsible for the conceptualization, literature search, and drafting of the manuscript. I.S.G. contributed to data curation and critical revision of the manuscript. A.G. was involved in methodological design and provided important intellectual content. A.A. and H.N. supervised the study, contributed to the study design, and performed critical revision of the manuscript for important intellectual content. All authors read and approved the final manuscript.


Declaration of AI-assisted technologies: During the preparation of this manuscript, ChatGPT (OpenAI) was used solely to improve grammar, language quality, clarity, readability, and section organization. All scientific content, numerical data, references, interpretations, and conclusions were independently reviewed and verified by the authors. The authors take full responsibility for the scientific integrity and final content of the manuscript.

Open Access Policy: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/

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