B cell chronic lymphocytic leukemia

My grandfather has had two burn like skin patches on his shoulder. Those patches where biopsies.

Biopsy came back today as Cuteanous involvment by B cell chronic lymphocytic leukemia.

nothing on the biopsy says stage or ifs is aggressive or slow growing.

What surprises me is that his wbc was normal and so was his plattelte. blood work was fine. This is so strange to be. Could this biopsy be wrong ? 

has anyone experienced this and how where you treated.