Will was diagnosed with acute lymphoid leukemia (all). his doctor ordered the use of his own t cells that have been modified in the lab to recognize and destroy his own tumor. what cancer treatment approach did patient will have?

The cancer treatment approach is Immunotherapy where an agent called nivolumab could have been used to stimulate the T cells to target cancer cells. In addition, an Immunotherapy is a type of therapy that uses substances to stimulate the immune system to aid the body fight cancer, contagion and other diseases. Various kinds of immunotherapy only aim certain cells of the immune system while others affect the immune system in a general way. 

Yes, this is very true. specifically causing damage in the  dentrite.