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Cancer symptoms are changes in the body caused by the presence of cancer. They are usually caused by the effect of a cancer on the part of the body where it is growing, although the disease can cause more general symptoms such as weight loss or tiredness. There are more than 100 different types of cancer with a wide range of signs and symptoms ...
Early symptoms of photoaging: Dyspigmentation, the formation of wrinkles and other symptoms appear around regions of skin commonly exposed to sun, mostly the eyes, mouth and forehead. [10] The lips may be affected. [10] In Canadian women, the upper chest is commonly affected. [10] Spider veins on face and neck; Loss of color and fullness in lips
Some substances cause cancer primarily through their physical, rather than chemical, effects on cells. [32] A prominent example of this is prolonged exposure to asbestos, naturally occurring mineral fibers which are a major cause of mesothelioma, which is a cancer of the serous membrane , usually the serous membrane surrounding the lungs. [ 32 ]
Aging is characterized by a progressive loss of physiological integrity, leading to impaired function and increased vulnerability to death. The hallmarks of aging are the types of biochemical changes that occur in all organisms that experience biological aging and lead to a progressive loss of physiological integrity, impaired function and, eventually, death.
According to cancer researcher Robert A. Weinberg, "If we lived long enough, sooner or later we all would get cancer." [23] Some of the association between aging and cancer is attributed to immunosenescence, [24] errors accumulated in DNA over a lifetime [25] and age-related changes in the endocrine system. [26]
These diseases each cause changes in a few specific aspects of aging but never in every aspect at once, so they are often called "segmental progerias". [30] A 2003 report in Nature [31] said that progeria may be a de novo dominant trait. It develops during cell division in a newly conceived zygote or in the gametes of one of the parents.
Cancer treatment drugs pose a strong selective force on all types of cells in tumors, including cancer stem cells, which would be forced to evolve resistance to the treatment. Cancer stem cells do not always have to have the highest resistance among the cells in the tumor to survive chemotherapy and re-emerge afterwards.
Ulceration can cause bleeding that can lead to symptoms such as coughing up blood (lung cancer), anemia or rectal bleeding (colon cancer), blood in the urine (bladder cancer), or abnormal vaginal bleeding (endometrial or cervical cancer). Although localized pain may occur in advanced cancer, the initial tumor is usually painless.