CD200 and B-cell chronic lymphocytic leukemia: This is at variance to CD200 expression evaluated as MFIR (≥18.0), where a lower accuracy (93.6% vs. 99.11%, respectively), a higher sensitivity (100% vs. 94.97%, respectively), and lower specificity (83.2% vs. 98.1%, respectively) were detected with a significant difference in CLL discriminative accuracy, p < 0.04.