Flow cytometric analysis revealed that the lymphadenopathy was arising from effects across multiple leukocyte lineages: total leukocytes, T cells, B cells, and myeloid lineages as defined by CD45, CD3, B220, and GR1 (Ly-6G/Ly-6C) positivity (Figure 2A and Supplemental Figure 4A). Here, PTPRC is linked to Lymphadenopathy.