What is Uterine Sarcoma?
Uterine sarcoma is a rare and aggressive type of cancer that originates in the muscles or other supporting tissues of the uterus (womb). Unlike the more common endometrial cancer, which starts in the lining of the uterus, uterine sarcomas form in the myometrium (the muscle layer) or the connective tissues of the uterus. There are several types of uterine sarcoma, including:
- Leiomyosarcoma: This type begins in the smooth muscle cells of the myometrium.
- Endometrial Stromal Sarcoma: This type starts in the connective tissue cells of the endometrium (the lining of the uterus).
- Undifferentiated Sarcoma: This is a more aggressive and less common type that can develop in any part of the uterus.
Risk Factors
The exact cause of uterine sarcoma is not well understood, but several risk factors have been identified. Here are the key risk factors:
- Age: The risk of developing uterine sarcoma increases with age, particularly after menopause. Most cases are diagnosed in women aged 50 and older.
- Race: African-American women have a higher risk of developing uterine sarcoma compared to women of other races.
- Radiation therapy: Previous radiation therapy to the pelvis for other cancers increases the risk of developing uterine sarcoma.
- Use of tamoxifen: Women who have taken tamoxifen, a drug used to treat breast cancer, have a slightly increased risk of developing uterine sarcoma. The risk is related to the duration and dose of tamoxifen use.
- Genetic predisposition: Certain genetic conditions, such as hereditary leiomyomatosis and renal cell cancer (HLRCC) syndrome, can increase the risk of developing uterine leiomyosarcoma, a subtype of uterine sarcoma.
- Previous cancer: A history of other cancers, particularly retinoblastoma (a rare eye cancer) or other sarcomas, can increase the risk.
- Hormonal factors: Prolonged exposure to estrogen without the balance of progesterone, as seen in women with estrogen replacement therapy who have not had a hysterectomy, may increase the risk.
It's important to note that having one or more risk factors does not mean a woman will develop uterine sarcoma, and some women with uterine sarcoma may not have any known risk factors. Regular check-ups and discussing any concerns with your GW Cancer Center healthcare provider can help in the early detection and management of potential risks.