What are secondary causes of polycythemia?,”HERAHypoxia (altitude, COPD, OSA, heart dz, IPF)EPO-secreting tumours (renal, hepatic, cerebellar, pheochromocytoma, uterine)Renal – PCKD, hydronephrosis
post-transplantAdrenal – Cushing syndrome (adrenal adenoma)”