IL32 and myeloid sarcoma: Focused investigations of the cells present in the cerebrospinal fluid (CSF) of MS patients support the importance of these three cytokines (12, 13), but recent, unbiased examination of gene expression in cerebrospinal fluid cells with RNA-Seq has expanded our concept of the pathogenic phenotype of MS T cells and identified additional transcripts upregulated in MS, such as IL32 (14–16).