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University revision · Hematology

Myeloproliferative Neoplasms

This topic covers the Myeloproliferative Neoplasms (MPNs), a group of clonal disorders originating from a haematopoietic stem cell and characterised by overproduction of one or more mature blood cell lines. It is essential for advanced haematology students in Zambian universities and colleges. The focus is on the three classic non-leukaemic MPNs: Polycythaemia Vera (PV), Essential Thrombocythaemia (ET), and Primary Myelofibrosis (PMF). The unifying pathogenic role of mutations in JAK2, CALR, and MPL genes is emphasised. Each disorder is explored in detail: PV presents with erythrocytosis, hyperviscosity symptoms, and thrombotic risk; ET is defined by a sustained elevated platelet count and associated haemorrhagic/thrombotic complications; PMF is characterised by bone marrow fibrosis, extramedullary haematopoiesis, and leukoerythroblastic blood film with tear-drop poikilocytes. Diagnostic criteria, clinical features, laboratory findings, and complications for each MPN are thoroughly explained. For tertiary learners, understanding the similarities, differences, and potential for transformation between these related disorders is crucial. This knowledge is directly applicable to diagnosing and managing patients with chronic blood count abnormalities and is a key component of professional haematology certification exams in Zambia and beyond.

Hematology Biomedical Science(Degree)
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Questions
100
Est. time
~100 min
Views
0
Pass mark
50%

How this revision works

Outcomes

If you passExcellent work! You have developed a clear and comparative understanding of the major myeloproliferative neoplasms. Your ability to distinguish PV, ET, and PMF based on clinical presentation, lab data, and underlying genetics is a sophisticated skill that will serve you well in clinical practice.
If you don't pass yetThe MPNs can be differentiated by their dominant cell line and complications. Revisit the diagnostic thresholds for PV (red cell mass) and ET (platelet count). Focus on the hallmark features: hyperviscosity in PV, thrombosis/bleeding in ET, and fibrosis with tear-drop cells in PMF. A comparative table may help.

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