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Objective   To investigative whether the odds tumor enhancement ratio (OTER) on cross-sectional imaging is a prognostic factor for hepatocellular carcinoma after transarterial chemoembolization (TACE).Methods   This study involved 126 patients who underwent TACE from May 2015 to March 2019. The signal intensity/Hounsfield units (HU) was measured by placing regions of interest on the tumor and surrounding liver in unenhanced and arterial-phase contrast-enhanced cross-sectional images. The OTER was calculated as follows: OTER = (HU TUMORart  − HU TUMORun )/ (HU LIVERart  − HU LIVERun ). Univariate analysis was performed to determine the factors associated with overall survival (OS). Variables with a P value of &lt;0.10 were included in the multivariate Cox regression analysis.Results   The median OS was 757 days. Tumors with a peripheral location, small size, and low OTER had better OS than those with a central location, large size, and high OTER. OS did not differ according to the extent of tumor involvement or tumor enhancement pattern. The OTER, tumor location, and size were included in the multivariate Cox regression analysis. A low OTER was the predictor of better OS.Conclusion   A high OTER is a risk factor for poor OS in patients undergoing TACE. This should be taken into consideration before the procedure.

journal of international medical research

Tumor enhancement ratio with unenhanced imaging is an independent prognostic factor for patients with hepatocellular carcinoma after transarterial chemoembolization