Hello, I'm being treated for chronic lymphocytic leukemia and polycythemia. My question is how many people in the United States have both of these? Thank you. - by Mike B from USA Topics: CLL (chronic lymphocytic leukemia), hematologic clones, MPN (myeloproliferative neoplasms), Polycythemia Vera, PV myelofibrosis, thrombocythemia View Answer