Differential expression analysis between Twist1+ and Twist1- diagnostic MF samples revealed 11 significantly differentially expressed genes; OAS2, ENSG00000201329, FCER1G, LGALS9, LYZ, LITAF, HLA-DRA, HLA-A, IGHM, NDUFA4 and RPGR. The gene discussed is IGHM; the disease is mycosis fungoides.