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Uterine Cancer: Risk Factors, Diagnosis and Management

AMaUterine Cancer: Risk Factors, Diagnosis and Management

Dr. Ainhoa Madariaga

Consultant Medical Oncologist, 12 de Octubre University Hospital (Madrid, Spain).

Uterine cancer, also called endometrial cancer (EC), is a gynecological malignancy that arises from the inner lining of the uterus which is medically known as endometrium. It is more common in North America and Western Europe due to lifestyle risk factors, whereas in India the incidence rate is low (2.4 cases per 100,000 women population) (1,2). Fortunately, most of these cancers present at an early stage and are associated with a good prognosis.

The most common symptom is abnormal vaginal bleeding which may include a change in the periods, bleeding between periods or bleeding after menopause. EC usually occurs after menopause, but it may also appear around the time menopause begins and during the menopausal transition. Experiencing an unusual vaginal bleeding, pain in the pelvic area or during sex should be brought to the doctor’s attention.

EC is often a hormone-sensitive disease thought to commonly arise in the context of excessive oestrogenic stimulation (3). Oestrogen is a female hormone mainly produced in the ovaries whose imbalance may cause changes in the endometrium and, eventually, lead to cancer. Classically, EC has been categorized in two types: type I (hormone-dependant) and type II (not oestrogen driven). The last subtype is less frequent, representing 10-20% of all EC; however, it is a more aggressive form that implies a poorer survival (4).

Risk factors for hyperoestrogenism include obesity, hormone therapy (such as tamoxifen, a medication commonly used for breast cancer treatment), polycystic ovarian syndrome and early menstruation/commencing menopause at a later age (5,6). Women who have never conceived fall also under the higher risk category (7). However, there are factors that provide protection against EC such as parity or oral contraceptive use, which reduces the risk of EC by 30 to 40% (8). On the other hand, little is known about risk factors for type II tumours, but may share risk factor profiles with oestrogen dependant tumours (4,9).

Additionally, around 3% of all EC depends on genetic factors related to mutations that are passed on from parents to offspring. Here, the Lynch syndrome (LS) plays a role. LS is a type of inherited cancer syndrome associated with a genetic predisposition to different cancer types such as EC or colorectal cancer. When familial history is highly suspicious of LS, genetic counselling is recommended (10). Therefore, those with several cases of these types of cancer in the same family should seek medical assistance.

The standard diagnostic work-up includes a physical examination and transvaginal ultrasonography with or without hysteroscopy (11). The hysteroscope is a lighted, flexible and thin camera device that allows for a visual examination of the inside cervix and uterus. Magnetic resonance imaging may be able to provide additional information on endometrial thickening or structural abnormalities as well as on surgical management. In addition, if an advanced stage is suspected, a computed tomography scan should be carried out.

In any case, the definitive diagnosis requires an endometrial tissue sample, usually obtained by curettage (12). This procedure involves cervical dilation with scraping of the endometrial lining. Once the diagnosis is reached, treatment should be carried out according to the patient´s condition. Surgery is the mainstay of the initial management and staging is based on pathological evaluation after surgery.

For the early-stage disease (stages I and II), surgery is the primary treatment. For most patients, the current surgical approach includes laparoscopic or robotic removal of the uterus (hysterectomy), cervix, fallopian tubes and ovaries (salpingo-oophorectomy) without vaginal cuff resection, and a lymph-node evaluation (10,13). Depending on the stage of disease and other risk factors, preventive radiotherapy and/or chemotherapy can be used to reduce risk of recurrence.

In the advanced-disease context (stages III and IV), surgery may be considered when complete resection is feasible with an acceptable side-effect and quality of life profile. Systemic therapy for advanced EC may include chemotherapy based on intravenous drugs (carboplatin/paclitaxel) or hormonal therapy, depending on the tumour characteristics. Currently, molecular characterization (a fingerprint of the tumour looking at gene and protein alterations) may be helpful to tailor treatment for early, advanced and recurrent disease.

Post-treatment surveillance is recommended for early detection of recurrent disease. The Society of Gynecologic Oncology (SGO) recommends follow-up symptom surveillance and pelvic examinations every three to six months for two years post-treatment, then every six months for three years, and annually thereafter (14).

Authors: Macarena Rey1, Ainhoa Madariaga1

1 Medical Oncology Department, 12 de Octubre Hospital, Madrid, Spain.

 

MRDr. Macarena Rey 

Medical Education:

2011-2017:  Degree in Medicine (MD) Universidad Complutense de Madrid, Facultad de Medicina (Medical School), Madrid, Spain • 2011: Award in the national ranking of top100 admission marks to university studies • 2015: Erasmus+ grant for European exchange programme (destination: Manchester Royal Infirmary, UK).

2017-2023: Medical Residency program in Medical Oncology • Centre: University Hospital 12 de Octubre, Madrid, Spain • Mentor: Luis Paz-Ares MD, PhD.

2020-2021: Molecular Oncology Master (MOM) • Degree awarding entity: University Rey Juan Carlos, Madrid, Spain in collaboration with the Spanish National Centre for Cancer Research (CNIO).

 References:

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