Współwystępowanie nowotworów układów krwiotwórczego i chłonnego u tego samego pacjenta — dwa opisy rzadkich przypadków

The coexistence of myeloid and lymphoid malignancies in the same patient is a rare condition. In this article we describe two case reports of patients who developed these two hematological malignancies. The first patient was 25 years-old male, who developed chronic myeloid leukemia 12 months after Burkitt’s lymphoma treatment. In the second patient, 55 years-old female, plasma cell myeloma and polycythemia vera was diagnosed simultaneously. It is still unclear what mechanisms lead to development of two hematological neoplasms originating from two separate cell lineages of hematopoiesis in one patient. Larger studies to establish pathogenesis, epidemiology, prognosis but primarily diagnosis and treatment methods are required.