Complex sentence: A CBC normally shows low counts for white blood cells, red blood cells, and platelets in HCL patients; but, if large numbers of hairy cells are in the blood stream, then normal or even high lymphocyte counts may be found.
Split into simpler sentences: A CBC normally shows low counts for white blood cells, red blood cells, and platelets in HCL patients. However, if large numbers of hairy cells are in the blood stream, then normal or even high lymphocyte counts may be found.