CD19 and incontinentia pigmenti: Furthermore, patients with IP showed significantly higher CD19+ T cell counts (0.92 × 109/L vs. 0.61 × 109/L), CD3+ T cell (2.58 × 109/L vs. 1.87 × 109/L), and CD4+ T cell counts (1.43 × 109/L vs. 1.00 × 109/L), and lower serum IL-6 (28.29 vs. 44.72 pg/ml), IL-10 (5.88 vs. 8.05 pg/ml), and IFN-γ (14.55 vs. 32.97 pg/ml) levels relative to PC children (Table 3 and Figures 2, 3).