4.5 Article

Preoperative MR imaging for predicting early recurrence of solitary hepatocellular carcinoma without microvascular invasion

Journal

EUROPEAN JOURNAL OF RADIOLOGY
Volume 138, Issue -, Pages -

Publisher

ELSEVIER IRELAND LTD
DOI: 10.1016/j.ejrad.2021.109663

Keywords

Hepatocellular carcinoma; Microvascular invasion; Magnetic resonance imaging; Liver Imaging Reporting and Data System

Funding

  1. Guangxi Science and Technology Department research program
  2. Guangxi Clinical Research Center for Medical Imaging Construction [Guike AD20238096]
  3. Research Institute of Innovative Think-tank in Guangxi Medical University [GXMUZK20]

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This study found that preoperative MR imaging features such as tumor size, nonsmooth tumor margin, and presence of mosaic architecture can predict early recurrence of solitary HCC without MVI after curative resection. A nomogram was constructed to estimate individualized risk, incorporating these features identified through multivariable analysis.
Objectives: This study aimed to identify preoperative MR imaging features for predicting early recurrence after curative resection of solitary hepatocellular carcinoma (HCC) without microvascular invasion (MVI). Methods: 124 patients with MVI-negative HCC who underwent preoperative dynamic contrast-enhanced 1.5-T MR imaging before surgical resection were included. Liver Imaging Reporting and Data System (LI-RADS v2018) imaging features and three non-LI-RADS MR imaging features for predicting early recurrence (intrahepatic recurrence<2 years) were identified by univariable and multivariable analyses. A nomogram was constructed for individualized risk estimation, and its predictive accuracy and discriminative ability were identified by concordance index (C-index) and calibration curve. Results: In multivariable analysis, tumor size (p = 0.045), nonsmooth tumor margin (p = 0.013), and presence of mosaic architecture (p = 0.035) were independent significant variables associated with early recurrence. These were all incorporated to establish the nomogram. The C-index of the nomogram was 0.743 (95 % CI: 0.697-0.788). Conclusion: At dynamic contrast-enhanced MR imaging, tumor size, nonsmooth tumor margin, and presence of mosaic architecture may be helpful to predict early recurrence of solitary HCC without MVI after curative resection.

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