Cancer begins in cells, the building blocks that make up tissues. Tissues make up the uterus and the other organs of the body.
Normal cells grow and divide to form new cells as the body needs them. When normal cells grow old or get damaged, they die, and new cells take their place.
Sometimes, this process goes wrong. New cells form when the body doesn’t need them, and old or damaged cells don’t die as they should. The buildup of extra cells often forms a mass of tissue called a growth or tumor.
- Benign tumors (such as a fibroid, a polyp, or endometriosis):
- are usually not a threat to life
- can be treated or removed and usually don’t grow back
- don’t invade the tissues around them
- don’t spread to other parts of the body
- Malignant growths:
- may be a threat to life
- usually can be removed but can grow back
- can invade and damage nearby tissues and organs (such as the vagina)
- can spread to other parts of the body