FCER2 and B-cell chronic lymphocytic leukemia: This finding indicates that the average expression of CD23 in patients with typical CLL was higher than in patients with atypical CLL (p-value = 0.045), aligning with the results of Frater and his colleagues' study, where CD23 expression was significantly higher in patients with typical chronic lymphocytic leukemia (P=0.04) (23).