PTPRC and neoplasm: Our data revealed higher average fractions of some immune system cell types in the CD45+ TAS as compared to CD45+ tumor epithelium for both naïve B cells (18% vs. 15%), memory B cells (9% vs. 3%), naïve CD4 T cells (6% vs. 4%) and T follicular helper cells (Tfh) (3% vs. 1%).