Non-doctor health professionals that may be a part of the orthopedics team include: 1  Athletic trainers. 2  Counselors. 3  Nurse practitioners. 4  Physical therapists. 5  Physician assistants. 6  Psychologists. 7  Social workers. 8  Vocational workers.
The main response of the immune system to tumors is to destroy the abnormal cells using killer T cells, sometimes with the assistance of helper T cells. Tumor antigens are presented on MHC class I molecules in a similar way to viral antigens. This allows killer T cells to recognize the tumor cell as abnormal.
The immune response to a transplanted organ consists of both cellular (lymphocyte mediated) and humoral (antibody mediated) mechanisms. Although other cell types are also involved, the T cells are central in the rejection of grafts. The rejection reaction consists of the sensitization stage and the effector stage.