MOG and myeloid sarcoma: Although the detection of KI-67 was difficult in unstimulated B cells, a trend (P = 0.06) was found for the two cohorts: 1.44 ± 0.37% MOG-BBR positive for KI-67 in MS patients (n = 16) and 3.49 ± 0.86% in HI (n = 17) (Figure 4).