Hepatocellular carcinoma concurent with gastric adenocarcinoma is a rare but possible case. In addition, selecting an effective treatment for two primary cancers is often difficult. In this report, we present the first case of hepatocellular carcinoma concurent with gastric adenocarcinoma treated with atezolizumab and bevacizumab combination therapy.

Noonan syndrome is a genetic multisystem disorder characterized by distinctive facial features, developmental delay, congenital heart disease, and other conditions. It is associated with mutation of genes encoding the proteins in the RAS-MAPK pathway, including PTPN11. We herein describe the first case of Noonan syndrome complicated with hepatocellular carcinoma.