I Hope. My Son Has Leukemia, 2000, Last August It

i hope. my son has leukemia, 2000, last august it came back, his doctor is keeping an eye on him, he is now taking three chemo pills, they make him tired and no appitite, now they put him on two pill a day, but now he is coming up with lymph nodes on his cheek, tested, okay, i am his mother and i am worried, i want to know will this cancer kill him?