TSPO and myeloid sarcoma: TSPO-binding was quantified as distribution volume ratio (DVR) in normal-appearing white matter (NAWM), thalamus, whole brain and cortical gray matter (cGM).<h4>Results</h4>Male MS patients had higher DVRs compared to female patients in the whole brain [1.22 (0.04) vs. 1.20 (0.02), <i>p</i> = 0.002], NAWM [1.24 (0.06) vs. 1.21 (0.05), <i>p</i> = 0.006], thalamus [1.37 (0.08) vs. 1.32 (0.02), <i>p</i> = 0.008] and cGM [1.25 (0.04) vs. 1.23 (0.04), <i>p</i> = 0.028].