Which of the following is not a cause of secondary polycythemia ?
Correct answer: D. Myeloproliferative changes
- A. High Altitude
- B. Cerebellar hemangioblastoma
- C. Pheochromocytoma
- D. Myeloproliferative changes
Explanation
Myeloproliferative disorders, especially polycythemia vera, cause primary rather than secondary polycythemia because the marrow produces excess red cells independently of erythropoietin. High altitude, pheochromocytoma and cerebellar hemangioblastoma can increase erythropoietin-driven red-cell production.
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