What do leukemia sufferers have too many of?

Even though I know the answer, I searched Google under the key words "leukemia" to get these possible sources:

http://en.wikipedia.org/wiki/Leukemia
http://www.cancercenter.com/leukemia.cfm?source=google&c=1230:1
http://www.cancer.gov/cancertopics/types/leukemia
http://www.medicinenet.com/leukemia/article.htm

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.

Leukemia sufferers have too many abnormal white blood cells. This excess production of abnormal white blood cells interferes with the bone marrow's ability to produce red blood cells, platelets, and normal white blood cells, leading to symptoms such as anemia, bleeding, and increased susceptibility to infections. It is important for individuals with concerns about leukemia to consult with a medical professional for a proper diagnosis and treatment.