As has been reported for human MPNST, we found that cisMPNSTs contained few T cells (including CD3+ T cells, CD4+ T helper [Th] cells, and CD8α+ cytotoxic T cells) (Figure 1A) and few B cells (CD20+) (Figure 1B) compared with spleen and pNFs. Here, CD4 is linked to malignant peripheral nerve sheath tumor.