The Cancer Definition
Cancer is a condition in which some cells in the body grow out of control and spread to other regions of the body.
Cancer may begin practically anywhere in the billions of cells that make up the human body. Human cells normally expand and multiply (via a process known as cell division) to generate new cells as needed by the body. Cells die as they get old or injured, and new cells replace them.
This ordered process can sometimes break down, resulting in aberrant or damaged cells growing and multiplying when they shouldn't. Tumors, which are masses of tissue, can grow from these cells. Tumors may or may not be malignant (benign).
Cancerous tumours can infect adjacent tissues and spread to other parts of the body, resulting in the formation of new tumours (a process called metastasis). Malignant tumours are another name for cancerous tumours. Many malignancies, including leukemias, create solid tumours, whereas cancers of the blood do not.
Benign tumours do not penetrate or spread into neighbouring tissues. Benign tumours seldom reappear after being excised, although malignant ones do. However, benign tumours can grow to be extremely enormous. Some, such as benign brain tumours, can produce significant symptoms or even be fatal.
Cancer Cells vs. Normal Cells: What's the Difference?
Cancer cells are distinct from normal cells in a number of ways. Cancer cells, for example:
grow in the absence of external cues to do so. Normal cells can only develop in response to such signals.
Signals that instruct cells to cease dividing or die are ignored (a process known as programmed cell death, or apoptosis).
expand to other parts of the body by invading neighbouring regions. When normal cells come into contact with other cells, they cease growing, and most normal cells do not travel across the body.
instruct blood vessels to expand in the direction of malignancies These blood veins provide oxygen and nourishment to tumours while also removing waste items.
Isolate yourself from the immunological system. Damaged or aberrant cells are generally eliminated by the immune system.
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