Dette kan til dels skyldes kræftmedicinen, men kan også skyldes Savene, der ligesom kræftmedicinen er vævs - giftigt (det ødelægger celler, der deler sig), og denne virkning kan ramme knoglemarven.
The patient can develop low blood levels of white blood cells and platelets; this can be due in part to their anti-cancer treatment, but also to Savene, as the medicine itself is a cytotoxic (a medicine that destroys cells that are multiplying) that can affect the bone marrow.