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Cancer is a disease in which cells grow uncontrollably and form tumors. Cancer is any malignant growth or tumor caused by abnormal and uncontrolled cell division; it is nothing but the abnormal and uncontrolled cell division of the normal cell of the body. The cells which will follow a systematic life cycle to undergo cell division, somehow becomes uncontrollable and starts multiplying rapidly and sometimes acquires abnormal characters.
Cancer is also defined as the name for diseases in which the body’s cells become abnormal and divide without control.
The cancer may spread to other parts of the body through the lymphatic system or the blood stream. Cancer cells may invade nearby tissues.
The word cancer actually means “crab,” like the zodiac sign. Around 400 B.C., Greek physician Hippocrates is said to have named the disease karkinos, which is Greek for “crab,” when he noticed that tumors formed a crab-like shape. The word cancer describes not just a disease, but any sort of evilness that can spread. Hatred and bigotry are cancers that can destroy communities.
There are more than 200 different types of, known cancers that afflict humans.
Cancer is also described as a class of diseases characterized by out-of-control cell growth.
Cancer harms the body when damaged cells divide uncontrollably to form lumps or masses of tissue called tumors (except in the case of leukemia where cancer prohibits normal functioning of the blood by abnormal cell division in the blood stream). Tumors can grow and interfere with the normal functioning of the Digestive, Nervous, and Circulatory systems, and the cancer cells by themselves can produce and release hormones that alter body function.
Tumors that stay in one spot and demonstrate limited growth are generally considered to be “Benign.” Tumors which spread to other parts of the body either by Local invasion, Hematological (through blood) or Lymphatic systems are considered as “Malignant