Immunohistochemistry showed that the tumor cells were positive for CD4, CD56, CD123 (Fig. 1D–F) and CD43, but negative for CD3, CD5, CD20, CD30, CD45RO, CD79α, CD68, anaplastic lymphoma kinase, paired box 5, myeloperoxidase, granzyme B, T-cell intracellular antigen-1 and terminal deoxynucleotidyl transferase (TdT). Here, DNTT is linked to neoplasm.