A friend of mine has been admitted to hospital with Acute Lymphoblastic Leukemia. Her husband called us up to tell us that she will be going through spinal tapping and that the doctors are doing everything that they can to help her get better, but the situation is very unstable and scary at the moment. Could you give me some information about this spinal tapping and what it is that they do to you when you have Acute Lymphoblastic Leukemia?