ACE2 and renal cell carcinoma: Our analysis of 12,664 tumours of 119 different subtypes identified renal cell carcinomas derived from the proximal tubulus and colorectal adenocarcinomas as the most frequently ACE2-positive cancer types, followed by gastric adenocarcinoma, ductal and papilla Vaterii-derived pancreatic adenocarcinoma as well as cholangiocellular and hepatocellular carcinoma of the liver.