ERBB2 and neoplasm: These factors showing statistically significant differences in univariate analysis were included in the multivariate logistic regression analysis, and the results showed that four of them were independent risk factors for positive HER2 expression: enhancement ratio in the arterial phase (odds ratio [OR], 4.535; P < 0.001), intratumoral necrosis (OR, 2.491; P = 0.017), tumor margin (OR, 3.773; P < 0.001), and CA125 level (OR, 5.551; P = 0.017) (Table 3).