ENDOMETRIAL CANCER |
Endometrial Cancer Overview
The endometrium is the tissue lining the uterus (or womb). The uterus, a hollow organ about the size and shape of a pear, is found in a woman's pelvic region. The upper part of the uterus is called the corpus; the lower, narrower part of the uterus is called the cervix. The cervix is the opening between the uterus and the vagina. The outer layer of the uterus is called the myometrium. The myometrium is thick and composed of strong muscles. These muscles contract during labor to push out the baby.
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The endometrium is soft and spongy. Each month, the endometrium changes as part of the menstrual cycle. Early in the cycle, the ovaries secrete a hormone called estrogen that causes the endometrium to thicken. In the middle of the cycle, the ovaries stop secreting estrogen and start secreting another hormone called progesterone. Progesterone prepares the innermost layer of the endometrium to support an embryo should conception (pregnancy) occur. If conception does not occur, the hormone levels decrease dramatically. The innermost layer of the endometrium is then shed as menstrual fluid.
Endometrial cancer occurs when cells of the endometrium undergo a transformation and begin to grow and multiply without the control mechanisms that normally limit their growth. As the cells grow and multiply, they form a mass called a tumor. Cancer is dangerous because it overwhelms healthy cells by taking their space and the oxygen and nutrients they need to survive and function.
Not all tumors are cancerous; however, cancerous tumors are malignant, meaning they can spread to other tissues and organs. Cancerous tumors may encroach on and invade neighboring organs or lymph nodes, or they may enter the bloodstream and spread to the bones or distant organs, such as the lungs. This process is called metastasis. Metastatic tumors are the most aggressive and serious of all tumors.
Two main types of endometrial cancers exist. Nearly all endometrial cancers are endometrial adenocarcinomas, meaning they originate from glandular (secreting) tissue. The other type of endometrial cancer, uterine sarcomas, originates in the connective tissue or muscle of the uterus. A subtype of endometrial adenocarcinomas, adenosquamous carcinoma, includes squamous cells (that is, the type of cells found on the surface of the skin and cervix). Other subtypes of endometrial adenocarcinomas are papillary serous adenocarcinomas and clear cell carcinomas. Because they are more common than uterine sarcomas, endometrial adenocarcinomas are the focus of this article.
Therapy for Endometrial
Radiation therapy can be used. Sometimes radioactive pellets are placed inside the body near the tumor. This is called brachytherapy or internal radiation therapy. Fatigue, upset stomach, diarrhea and nausea are also common complaints of women having radiation therapy.
Chemotherapy uses anticancer drugs to kill the cancer cells. The drugs are given orally or intravenously. They enter the bloodstream and can travel to all parts of the body to kill cancer cells. Generally, a combination of drugs is given since it is more effective than a single drug in treating cancer. Side effects of this treatment include stomach upset, vomiting, appetite loss, hair loss, mouth or vaginal sores, fatigue, menstrual cycle changes and premature menopause.
Hormonal therapy uses drugs like progesterone that will slow the growth of Endometrial cells. These drugs are usually available as pills. This therapy is usually reserved for women with advanced or recurrent disease.
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