Dating a testicular cancer survivor
Sources of ionizing radiation include medical imaging and radon gas.
For example, if a person who uses tobacco heavily develops lung cancer, then it was probably caused by the tobacco use, but since everyone has a small chance of developing lung cancer as a result of air pollution or radiation, the cancer may have developed for one of those reasons.
More than half of the effect from diet is due to overnutrition (eating too much), rather than from eating too few vegetables or other healthful foods.
Some specific foods are linked to specific cancers. Viruses are the usual infectious agents that cause cancer but cancer bacteria and parasites may also play a role.
The findings that result depend on the cancer's type and location. Many frequently occur in individuals who have other conditions. Thus, it is common for people diagnosed with cancer to have been treated for other diseases, which were hypothesized to be causing their symptoms.
Local symptoms may occur due to the mass of the tumor or its ulceration.Non-ionizing radio frequency radiation from mobile phones, electric power transmission and other similar sources have been described as a possible carcinogen by the World Health Organization's International Agency for Research on Cancer.The vast majority of cancers are non-hereditary (sporadic).The symptoms of metastatic cancers depend on the tumor location and can include enlarged lymph nodes (which can be felt or sometimes seen under the skin and are typically hard), enlarged liver or enlarged spleen, which can be felt in the abdomen, pain or fracture of affected bones and neurological symptoms.