Secondary polycythemia Inclusion term(s):Acquired polycythemiaEmotional polycythemiaErythrocytosis NOSHypoxemic polycythemiaNephrogenous polycythemiaPolycythemia due to erythropoietinPolycythemia due to fall in plasma volumePolycythemia due to high altitudePolycythemia due to stressPolycythemia NOSRelative polycythemia