Usually the immune system would wipe out
cancer cells from a foreign host
However the recipients were quite
sick prior to the transplant
or they would not have needed the transplant
The recipients would have been on
immunosuppressant drug to prevent rejection
And a lymphoma itself is a
cancer of the immune system
The Recipients immune system is severely weakened
The grafted Lymphoma cells are not rejected
And another patient is killed...
What is cancer? Is it caused by a germ, or a virus or a fungus? What is it?