CD34 and mature T-cell and NK-cell non-Hodgkin lymphoma: Interestingly, while not described as a typical feature of the gene expression profile of human PTCL-NOS, we did observe similar upregulation of CD34 in the transcriptome of human PTCL-NOS based on publicly available gene expression data from 68 cases of PTCL-NOS published by Etebari et al. [33] (log2 fold change = 5.15, padj = 1.53 × 10-26) and 28 cases of PTCL-NOS published by Piccaluga et al. [32] (log2 fold change = 0.46, padj = 5.08 × 10-01).