CD80 and chronic myelogenous leukemia, BCR-ABL1 positive: The result demonstrated a significantly decreased ratio of CD80/CD86 both in the PB (0.42 vs 0.90, P = 0.0173) and BM (0.19 vs 0.36, P = 0.0650) of DN-CML patients, and 5 patients had an inverse ratio.