Cancer begins in cells, the building blocks that forms the tissues. Tissues makes up the organs of the body.
Normally, cells grow and divide to form new cells as the body needs them. When cells grow old, they die, and new cells take their place.
Sometimes, this orderly process goes wrong. New cells form when the body does not need them, and old cells do not die when they should. These extra cells can form a mass of tissue called a growth or tumor.
Tumors can be benign or malignant. Benign tumors are not cancer. Malignant tumors are cancer.
Most cancers are named where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. Lymphoma is a cancer that starts in the lymphatic system. And Leukemia is cancer that starts in white blood cells.
Normally, cells grow and divide to form new cells as the body needs them. When cells grow old, they die, and new cells take their place.
Sometimes, this orderly process goes wrong. New cells form when the body does not need them, and old cells do not die when they should. These extra cells can form a mass of tissue called a growth or tumor.
Tumors can be benign or malignant. Benign tumors are not cancer. Malignant tumors are cancer.
Most cancers are named where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. Lymphoma is a cancer that starts in the lymphatic system. And Leukemia is cancer that starts in white blood cells.
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