Several factors can act synergistically to produce cancer in a
step-wise fashion.  Give three examples with the names of the specific
cancers considered and the number of mutations (or other genetic
changes) involved in each case.

C.L.L. or Chronic Lymphocytic Leukemia, is a comparatively slow acting
cancer of the blood, where the bone marrow produces excessive white
cells. Normal levels are 4.5 while sufferers can go as high as 97. The
excessive cells overload the spleen and other internal organs. Current
long term treatment is now a drug called MABTHERA.

Insert usual comment about homework here....