ATXN1 and myeloid sarcoma: We first examined whether cells involved in MS are altered in untreated Atxn12Q/2Q (WT) mice, f-ATXN1146Q/2Q (Atxn1 heterozygous knock-in) mice, and Atxn12Q/− (Atxn1 heterozygous knock-out) mice on a C57BL/6J background.