The impact of pre-existing diabetes mellitus (DM) on hepatocellular carcinoma (HCC) occurrence and prognosis is complex and unclear. The aim of this meta-analysis is to evaluate the association between pre-existing diabetes mellitus and hepatocellular carcinoma occurrence and prognosis. We searched PubMed. Embase and the Cochrane Library from their inception to January. https://allfixelectricales.shop/product-category/dryer-motor/