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Pathology - Primary myelofibrosis
A myeloproliferative neoplasm distinguished by the predominant proliferation of megakaryocytes and granulocytes in the bone marrow, accompanied by reactive deposition of fibrous connective tissue and extramedullary hematopoiesis.
Epidemiology • Estimated yearly incidence ranges from 0.5 to 1.5 per 100,000 individuals. • Predominantly affects people aged 60 to 70, with no discernible gender preference. Aetiology • Predominantly unknown in the majority of instances. Genetics • No specific genetic anomaly has been identified.
Presentation: Abdominal discomfort resulting from significant splenomegaly. • Nocturnal hyperhidrosis, pyrexia, and weight reduction.
Peripheral blood • Increased platelets and/or white cell count. • Decreased hemoglobin. The blood film exhibits leukoerythroblastosis characterized by teardrop-shaped red blood cells. Bone marrow • Megakaryocytes exhibit significant abnormalities characterized by extensive clustering and pronounced cytological atypia. • Progression is accompanied by an increase in marrow fibrosis.
Prognosis • Survival is contingent upon the degree of marrow fibrosis at the time of diagnosis. Patients exhibiting significant fibrosis have median survival durations of 3 to 7 years. The primary causes of mortality are bone marrow failure, thromboemboli, and the onset of acute myeloid leukemia (AML).
A myeloproliferative neoplasm distinguished by the predominant proliferation of megakaryocytes and granulocytes in the bone marrow, accompanied by reactive deposition of fibrous connective tissue and extramedullary hematopoiesis.
Epidemiology • Estimated yearly incidence ranges from 0.5 to 1.5 per 100,000 individuals. • Predominantly affects people aged 60 to 70, with no discernible gender preference. Aetiology • Predominantly unknown in the majority of instances. Genetics • No specific genetic anomaly has been identified.
Presentation: Abdominal discomfort resulting from significant splenomegaly. • Nocturnal hyperhidrosis, pyrexia, and weight reduction.
Peripheral blood • Increased platelets and/or white cell count. • Decreased hemoglobin. The blood film exhibits leukoerythroblastosis characterized by teardrop-shaped red blood cells. Bone marrow • Megakaryocytes exhibit significant abnormalities characterized by extensive clustering and pronounced cytological atypia. • Progression is accompanied by an increase in marrow fibrosis.
Prognosis • Survival is contingent upon the degree of marrow fibrosis at the time of diagnosis. Patients exhibiting significant fibrosis have median survival durations of 3 to 7 years. The primary causes of mortality are bone marrow failure, thromboemboli, and the onset of acute myeloid leukemia (AML).
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