Cancer of a blood

[Lyudmila]

1. The Leukemia, a leukosis, limfo-the sarcoma, a cancer of a blood are different illnesses or diseases, or one and too?
2. nehodzhinskaja limfoma and limfoblastnaja limfoma - than they differ? Whether probably full treatment?
3. What is the listerosis, a mononucleosis?