title: Coexistence of chronic lymphocytic leukemia and myeloproliferative neoplasm.
abstract: Chronic lymphocytic leukemia (CLL) is the most common adult leukemia in the Western world. Host immune surveillance caused mainly by the disease itself is speculated to be responsible for high incidence of secondary neoplasms. However, the simultaneous occurrence of CLL and myeloproliferative disorder in the same patient is extremely rare. In the present report, a case of an 81-year-old man who was diagnosed with chronic lymphocytic leukemia and concomitant essential thrombocythemia is presented. We describe the morphologic, immunophenotypic, cytogenetic, and molecular findings in this patient. We also review the current literature.
authors.affiliation: Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, Dabrowskiego 25, 40-032 Katowice, Poland.
authors.forename: Patrycja
authors.identifier: 0000-0003-2356-5090
authors.initials: P
authors.lastname: Zielinska
authors.affiliation: Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, Dabrowskiego 25, 40-032 Katowice, Poland.
authors.forename: Miroslaw
authors.identifier: 0000-0002-8550-8908
authors.initials: M
authors.lastname: Markiewicz
authors.affiliation: Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, Dabrowskiego 25, 40-032 Katowice, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Dzierzak-Mietla
authors.affiliation: Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, Dabrowskiego 25, 40-032 Katowice, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Koclega
authors.affiliation: Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, Dabrowskiego 25, 40-032 Katowice, Poland.
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Helbig
authors.affiliation: Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, Dabrowskiego 25, 40-032 Katowice, Poland.
authors.forename: Slawomira
authors.initials: S
authors.lastname: Kyrcz-Krzemien