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You were treated with radiation inside the uterus.

Treatment with radiation is also called radiotherapy. Your radiotherapy involved the use of special radioactive substances. When these radioactive materials break down, they produce radiation. This is why these substances are also referred to as radiation sources. Your radiotherapy involved the radiation sources being placed very close to the areas needing to be treated. The rays only work in the immediate vicinity of the radiation sources and are intended to destroy diseased tissue there. This is to protect the surrounding tissue as much as possible. By using radiation at close range, the rays can have a particularly targeted effect on the diseased tissue.

You had radiation sources inserted into your uterus. The uterus or womb sits in the pelvis and is pear-shaped. The narrower part extends downward into the vagina and is called the cervix. When a woman is pregnant, the child grows in her uterus.