Presence of microvascular invasion can be estimated preoperatively, by some clinical imaging features such as patient characteristics, serum biomarkers and radiological features. Contrast-enhanced ultrasonography (CEUS) and contrast-enhanced computed tomography (CECT) are routine preoperative conventional examinations for hepatocellular carcinoma (HCC) patients in China. Combining features of CEUS, CECT and clinical factors may improve preoperative MVI assessment. The purpose of this study is to construct a nomogram for preoperative MVI risk estimation with these possible factors.