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Role of CT texture analysis for predicting peritoneal metastases in patients with gastric cancer

  • Abdominal Radiology
  • Published:
La radiologia medica Aims and scope Submit manuscript

Abstract

Purpose

Aim of the study was to perform CT texture analysis in patients with gastric cancer (GC) to investigate potential role of radiomics for predicting the occurrence of peritoneal metastases (PM).

Materials and methods

In this single-centre retrospective study, patients with gastric adenocarcinoma and surgically confirmed presence or absence of PM were, respectively, enrolled in group PM and group non-PM. Patients with T1-staging, previous treatment or presence of imaging artifacts were excluded from the study. Pre-operative CT examinations were evaluated. Acquisition protocol consisted of gastric distension with water, pre-contrast and arterial phases on upper abdomen and portal phase on thorax and whole abdomen. Texture analysis was performed on portal phase images: the region of interest was manually drawn along the margins of the primitive lesion on each slice and the volume of interest of the whole tumour was obtained. A total of 38 texture parameters were extracted and analysed. ROC curves were performed on significant texture features (p < 0.05). Multiple logistic regression was conducted on features with the best AUC to identify differentiating variables for both groups.

Results

A total of 90 patients were evaluated (group PM, n = 45; group non-PM, n = 45). T2/T3 tumours were prevalent in group non-PM, T4 was significantly associated with group PM. Significant differences between the two groups were observed for 22/38 texture parameters. Volume and GLRLM_LRHGE showed the greatest AUC in ROC curve analysis (0.737 and 0.734, respectively) and were found to be independent differentiating variables of group PM in the multiple regression analysis (OR 8.44, [95% CI, 1.52–46.8] and OR 18.99 [95% CI, 84–195.31], respectively).

Conclusions

Our preliminary results suggest the potential value of CT texture analysis for predicting the risk of PM from GC, which may be helpful to stratify patients and address them to the most appropriate treatment.

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Abbreviations

GC:

Gastric cancer

PM:

Peritoneal metastases

HIPEC:

Heated intraperitoneal chemotherapy

CT:

Computed tomography

ROC:

Receiver operating characteristic

AUC:

Area under curve

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Authors and Affiliations

  1. Department of Radiological, Oncological and Pathological Sciences, Policlinico Umberto I, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy

    Giorgio Maria Masci, Fabio Ciccarelli, Fabrizio Ivo Mattei, Damiano Grasso, Carlo Catalano & Franco Iafrate

  2. Department of Surgery “Pietro Valdoni”, Policlinico Umberto I, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy

    Fabio Accarpio & Paolo Sammartino

  3. Department of Medical-Surgical and Translational Medicine-Radiology Unit, “Sapienza” University of Rome, Sant’Andrea Hospital, Rome, Italy

    Andrea Laghi

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  1. Giorgio Maria Masci
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Correspondence to Franco Iafrate.

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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.

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This study was approved by the local ethic committee and written informed consent was waived due to the retrospective nature of the study.

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Masci, G.M., Ciccarelli, F., Mattei, F.I. et al. Role of CT texture analysis for predicting peritoneal metastases in patients with gastric cancer. Radiol med 127, 251–258 (2022). https://doi.org/10.1007/s11547-021-01443-8

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