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POLYCYTHAEMIA (ERYTHROCYTOSIS) |
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relative polycythaemia: |
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any cause of plasma loss: |
dehydration (diuretics, etc.)Addison's disease prolonged bed rest burns |
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apparent polycythaemia: |
'stress polycythaemia' (Gaisböck syndrome) |
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absolute polycythaemia: |
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1� polycythaemia |
polycythaemia rubra vera [a myeloproliferative disorder; low/undetectable erythropoeitin] |
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2� polycythaemia [raised erythropoietin]: |
appropriate (due to chronic hypoxia): chronic obstructive pulmonary disease Pickwickian syndrome cyanotic heart disease high altitudes |
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inappropriate (erythropoeitin-secreting tumours): renal cell carcinoma hepatocellular carcinoma cerebellar haemangioblastoma post-renal transplantation uterine myoma Cushing's syndrome |
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