Can you help me with a question about blood disorders? My cousin was born Thursday.  It wasn't known until she was born that she had Down Syndrome.  She was doing very well, but all of a sudden her white blood cell number is at 1,000.  The drugs that they gave her to boost them worked at first, but now they are not.  They have begun a new drug, which they are giving a few days to work, but if it doesnt work they said that there will be nothing else that they can do.  They said they can't give her a bone marrow transplant.  She is scheduled for a CAT scan in the morning as well, because suddenly today she has a large "knot" on the back of her head.  My aunt was thinking possibly she had leukemia, but wouldn't her blood cells be extremely high, rather than extremely low?  If anyone knows or has experienced something similar with their newborn I would appreciate some thoughts. Thank You.

Summarized question: What are the cause and treatments of low white blood cell numbers in the newborn baby?