Monocytosis refers to an increase in the number of [[Monocytes|monocytes]] (haematogenous macrophages) in the blood. It may be found in conjunction with other changes indicative of a [[Stress Leucogram|stress leucogram]] or it may occur independently of other changes to the haematological profile. The blood monocytes themselves represent a brief transitional stage as they quickly move into tissues and differentiate further to tissue macrophages. As such, monocytes rarely perform any notable functions but they been found to phagocytose red blood cells in cases of [[Immune Mediated Haemolytic Anaemia|immune-mediated haemolytic anaemia]]. The major causes of monocytosis are: | Monocytosis refers to an increase in the number of [[Monocytes|monocytes]] (haematogenous macrophages) in the blood. It may be found in conjunction with other changes indicative of a [[Stress Leucogram|stress leucogram]] or it may occur independently of other changes to the haematological profile. The blood monocytes themselves represent a brief transitional stage as they quickly move into tissues and differentiate further to tissue macrophages. As such, monocytes rarely perform any notable functions but they been found to phagocytose red blood cells in cases of [[Immune Mediated Haemolytic Anaemia|immune-mediated haemolytic anaemia]]. The major causes of monocytosis are: |