Cancer is a disease wherein cells abnormally divide without control. These cells are able to invade other tissues and spread to other area of the body straight through the lymph and blood systems.
Normal body cells design and divide, and know when to stop growing. Eventually, they also die. But cancer cells continue to design and divide, and they don't die when they are supposed to.
Cancer cells normally clump together to form tumors. A developing tumor becomes a piece of cancer cells that can destroy colse to normal cells and harm the body's salutary tissues. At times cancer cells cut off from the former tumor, move to other parts of the body, where they keep expanding and later can form new tumors. The spread of a tumor to a new area in the body is called metastasis.
Types
There are more than a hundred distinct kinds of cancer. normally it is named after the organ where it started. For instance, cancer that begins at the colon is called a colon cancer. Cancer types can be classified into five (5) broader categories.
Carcinoma - is a type that start in the skin or tissues that cover internal organs. It can rise in the colon, breast, lung, liver, prostate, and stomach.
Sarcoma - is a term used to divulge a cancer that begins from supportive or connective tissue cells such as bones, cartilage, muscle, fat, and blood vessel.
Leukemia - is a type that begins in blood-forming tissue (e.g. Bone marrow) and causes huge estimate of abnormal blood cells to be formed and enter the blood.
Myeloma and Lymphoma - is a type that originates in the cells of immune system.
Central Nervous ideas Cancers - cancers that start in the tissues of the spinal cord and the brain.
Causes
Doctors are not unavoidable why some citizen get cancer and others don't. What they do know is that cancer is not contagious and that cancer cells are formed because the cells don't simply die and just continue growing. Cancer isn't caused by germs, like colds which mean you cannot catch it from person who has it. You can talk to, and hug person with cancer.
Symptoms
Cancer symptoms depend on where the cancer cells originated and where it has spread. Few cancers can be felt straight through the skin like for instance a lump on the breast. A convert in a mole or wart on the skin often indicates melanoma (also known as skin cancer). White spots on the tongue or white patches inside the mouth normally a symptom of oral cancer.
Other cancers have less illustrated symptoms. Some brain tumors symptoms occur in the early stage because they influence vital cognitive functions. The symptoms of pancreas cancer normally occur in the later stage when the cancer cause pain by pushing the nerves colse to it or get in the way with liver function causing jaundice or the yellowing of the eyes and skin. Symptoms can also occur when the tumor pushes against blood vessels and organs. Take for example, colon cancers direct to signs such as diarrhea, constipation, and changes in stool size. Prostate or bladder cancers can cause irregular urination.
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