Key points about low blood count due to chemotherapy
- a low blood count means having fewer new cells in the blood than is normal
- blood cells are the normal cells most often affected by chemotherapy
- there are 3 main types of blood cells - red cells, white cells and platelets
The affect of chemotherapy on blood cells
Blood cells are the normal cells most often affected by chemotherapy. Blood cells form in the bone marrow. Bone marrow is a spongy material that fills the centre of long bones and flat bones. Some chemotherapy medicines slow down blood cell production. This slowing of blood cell and platelet production in bone marrow is called myelosuppression.
A low blood count means having fewer new cells in the blood than is normal.
Different types of blood cells
There are 3 main types of blood cells:
- red cells
- white cells
- platelets
Low blood count during cancer treatment
A drop in the blood cell count usually happens 7 to 10 days after your child starts receiving chemotherapy medicines. It takes about 3 to 4 weeks for the bone marrow to recover after the chemotherapy finishes and for the blood count to return to a near normal level.
Blood tests during cancer treatment
Your child will have blood tests during chemotherapy to monitor the count levels of the cells. Your child will have blood tests as often as necessary to keep a close check on their blood count. Your child's healthcare team will monitor the results to see whether your child needs any supportive treatment.
The frequency of blood tests can vary from several times a day to several times a week.
For more information about low blood count see the following pages.
Low White Cell Count & Infection During Chemotherapy
Acknowledgements
All the pages in the childhood cancer section of this website have been written by health professionals who work in the field of paediatric oncology. They have been reviewed by the members of the National Child Cancer Network (NZ). Medical information is authorised by the National Child Cancer Network Clinical Leader.
