Microglia nodules in MS compared to microglia nodules in stroke significantly more often expressed FABP5 (MS: 81 of 143 nodules, per donor 55.2% ± 8.7%, stroke: 14 of 56 nodules, per donor 22.0% ± 19.6%, p = 3.3-6), DAGLB (MS: 62 of 79 nodules, per donor 73.8% ± 10.0%, stroke: 12 of 35 nodules, per donor 19.2% ± 22.5%, p = 1.11-8), and STARD13 (MS: 28 of 57 nodules, per donor 47.5% ± 19.9%, stroke: 7 of 24 nodules, per donor 25.1% ± 20.9%, p < 0.05). The gene discussed is FABP5; the disease is myeloid sarcoma.