The dataset contains data from 12 samples hybridized on Illumina HumanHT-12 array. -patient's primary lymphoma cells obtained from malignant ascites (P2-A1, P2-A2) -patient's non-malignant B-cells (CTRL1, CTRL2) -lymphoma cell line named UPF4D established from the patient's primary lymphoma cells after 15 and 75 days of in vitro cultivation (UPF4D-D15A, UPF4D-D15B, UPF4D-D75) -cells established by xenotransplantation of UPF4D cell line isolated ex vivo from infiltrated murine kidney (UPF4D-K) -cells established by xenotransplantation of UPF4D cell line isolated ex vivo from subcutaneously growing lymphoma (UPF4D-SC) -patient-derived xenograft (PDX) cells named VFN-D2 established by xenotransplantation of primary lymphoma cells into immunodeficient mice isolated ex vivo from the infiltrated murine kidneys (VFN-D2-K1, VFN-D2-K2) -patient-derived xenograft (PDX) cells named VFN-D2 established by xenotransplantation of primary lymphoma cells into immunodeficient mice isolated ex vivo from subcutaneously growing lymphoma (VFN-D2-SC). Samples were sorted using CD19-microbeads (Miltenyi). For xenotransplantation, NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ mice (referred to as NSG mice) were used. Overall design: Unsummarized data can be obtained using R package klenermicroarraydata available from https://bitbucket.org/kulvait/klenermicroarraydata.