http://www.leukemia-research.org/page.aspx?pid=226
Are leukemia/lymphoma/MDS contagious? Are they hereditary?
Blood cancers are not contagious, nor are they hereditary. Often times people become concerned for their family and loved ones thinking they might pass the disease on to someone close to them. This will not happen. It cannot be passed on through contact nor through genes. There has been no evidence showing any hereditary connections.
http://www.lls.org/resourcecenter/faqs/
Q:Is leukemia (or lymphoma, myeloma) inherited?
A:No. There is little to no evidence that these diseases are inherited. There are genetic components to the diseases and often there are alterations in the DNA but the cause of these changes is unknown