There are various different forms of cancer that affect all different parts of the body. Healthy cells will grow, divide, and eventually die, making way for new cells to take their place. In healthy young people this process is faster to help the individual grow. In adults, individual cells divide and replace each other only when they are worn out or are no longer able to repair lesions (Fox, 2009). Cancer is a process in which the cell begins to grow without control or stopping mechanism. There are several types of cancer, but they all begin with abnormal, out-of-control cell growth (Fox, 2009). The growth of cancer cells is very different from that of a normal healthy cell. These cells do not die and instead continue to generate and create other abnormal cells. These cells are also unique in that they will invade and conquer other cells (Fox 2009). Tumor cells exhibit some dysfunctions due to DNA sequencing. DNA usually promotes normal functioning; in a healthy, normal cell it will direct the cell towards death if it is beyond repair. When DNA is damaged, the programmed cell death function does not occur and instead of dying the cell reproduces more of these cells through mitosis creating more abnormal cells (American Cancer Society, 2014). DNA can become damaged for many different reasons. Damage can occur accidentally or be caused by environmental factors. There is no direct indication of how DNA is damaged (American Cancer Society, 2014). Cancer cells often clump together creating a tumor or mass. There are cancers such as leukemia that do not form tumors but thrive in the circulatory system depositing damaged cells throughout the body where they will eventually grow (American Cancer Society, 2014). C...... middle of paper ......r illness and work to improve quality of life at all levels. As a PTA it would be important to be aware of the different treatment methods and how this will affect the patient and their exercise abilities. It is important to be aware of any complications and be able to provide the patient with immediate treatment if necessary. There are also psychological factors that influence the patient and it is important to know how to provide the patient with the help and support he needs. These patients must be carefully monitored during treatment and require frequent rest periods. For those patients who have undergone surgery to treat cancer it is important to be able to care for wounds, amputated limbs and how to properly treat these patients. There are many different aspects to be aware of when treating a patient with bone cancer.