Answer:
The cancer causes the abnormal cells growth and inhibits the apoptosis process. Lekuemia may be define as the cancer of white blood cells and their number increases dramatically.
Busulfan is the drug used for the treatment of leukemia. This drug acts as a alkylating agent that might affects the genes involved in the cell cycle and inhibit the growth of cancerous cell. The treatment can only be resume in the condition if the patient again shows the increase in white blood cell count above 50,000/mm3.