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.
Most antigens are proteins that serve as the stimulus to produce an immune response. The term antigen comes from ANTI-body GENerating substances. Here are the steps in an immune response: When an antigen is detected by a macrophage (as describe above under phagocytosis), this causes the T-cells to become activated.