Cancer is a term for a malignant tumor or growth Aatlala of cells that spread after that to the tissues surrounding and these tumors are not useful and is growing at the expense of healthy tissue and some cancer cells had graduated from the original tumor and spread by Almufat or blood only remote devices in the body in a process called Alanbthat Metastasis.
Like all cells need malignant cells to both energy and nutrients to maintain the survival and growth is more likely that this requirement is the main reason for the weight loss that occurs in the early stage of infection even if the patient did not reduce the number of caloric intake did not change the type of activity physical role.
If you do not respond patients for treatment, the requirement metabolism by the cancer cells as well as loss of appetite, nausea, vomiting and other problems related to nutrition lead to a significant loss of weight and malnutrition as also lead to the collapse of the full body processes and this is the late stage of the disease.
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Cancer