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Enhancing Precision in Rectal Cancer Care: Unravelling the Correlation Between MRI Locoregional Staging and Prognostic Factors, With Post-resection Pathology

  • 0General Surgery, Royal Victoria Infirmary, Newcastle, GBR.
Cureus +

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November 28, 2024

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November 28, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Preoperative MRI of the pelvis shows fair accuracy in staging rectal cancer, with high specificity for predicting the circumferential resection margin and vascular invasion when compared to postoperative pathology. This aids in surgical planning.

Area Of Science

  • Oncology
  • Radiology
  • Medical Imaging

Background

  • Rectal cancer diagnosis and staging are critical for treatment planning.
  • Preoperative Magnetic Resonance Imaging (MRI) is a key modality for assessing rectal cancer.
  • Accurate locoregional staging, margin status, and vascular invasion prediction are essential for surgical outcomes.

Purpose Of The Study

  • To evaluate the diagnostic accuracy of preoperative MRI pelvis for locoregional staging of rectal cancer.
  • To assess MRI's ability to predict circumferential resection margin (CRM) and vascular invasion (V1).
  • To compare MRI findings with postoperative histopathological results.

Main Methods

  • Retrospective analysis of 143 patients with rectal adenocarcinoma who underwent preoperative MRI.
  • Comparison of MRI-based T and N staging, CRM, and V1 assessment with histopathology.
  • Calculation of sensitivity, specificity, PPV, NPV, accuracy, and weighted kappa statistics.

Main Results

  • MRI accuracy was highest for T0 (97.9%) and T4 (93.37%) tumors.
  • Weighted kappa for T staging was 0.401 and for N staging was 0.286, indicating fair agreement.
  • Kappa for extramural vascular invasion (V) and CRM was 0.269 and 0.225, respectively.
  • High specificity was observed for CRM and V1 detection.

Conclusions

  • Preoperative MRI demonstrates fair agreement with histopathology for T and N staging in rectal cancer.
  • MRI exhibits high specificity in identifying the circumferential resection margin and vascular invasion.
  • MRI is a valuable tool for preoperative assessment, aiding in surgical planning for rectal cancer.

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