Examination of H&E and IHC stained sections excluded the possible presence of B cell lymphomas in PDXs associated with Epstein–Barr Virus35,36 (Supplementary Fig. 8; carcinomas: pancytokeratin+/CD45−/CD20−, lymphomas: pancytokeratin−/CD45+/CD20+). This evidence concerns the gene PTPRC and lymphoma.