Uterine Cancer: A Comprehensive Guide

Overview

Uterine cancer, also known as endometrial cancer, begins in the uterus—the hollow, pear-shaped organ where a fetus grows during pregnancy. It is the most common gynecologic cancer in the United States, with over 66,000 new cases diagnosed annually (American Cancer Society, 2023). While it primarily affects postmenopausal women (average age at diagnosis: 60), it can occur in younger women as well.

There are two main types:

• Endometrial carcinoma (90% of cases): Begins in the lining of the uterus (endometrium).
• Uterine sarcoma (rare): Develops in the uterine muscles or supporting tissues.

With early detection, uterine cancer has a high survival rate (over 80% for localized cases). However, advanced stages require aggressive treatment.

Symptoms

Symptoms often appear early, making detection possible in initial stages. Key signs include:

• Abnormal vaginal bleeding: Most common symptom. This includes bleeding after menopause, between periods, or unusually heavy periods.
• Pelvic pain or pressure: Persistent discomfort in the lower abdomen.
• Unusual vaginal discharge: Watery, pink, or foul-smelling discharge not linked to menstruation.
• Pain during intercourse (dyspareunia).
• Unexplained weight loss (in advanced stages).
• Fatigue or weakness (due to anemia from chronic bleeding).

Note: These symptoms can also indicate benign conditions (e.g., fibroids, polyps). However, any abnormal bleeding after menopause should be evaluated immediately.

Causes and Risk Factors

The exact cause is unknown, but uterine cancer is linked to hormonal imbalances, particularly excess estrogen. Risk factors include:

Hormonal Factors

• Early menstruation (before age 12) or late menopause (after 55).
• Never being pregnant (nulliparity).
• Hormone replacement therapy (HRT) with estrogen alone (without progesterone).
• Polycystic ovary syndrome (PCOS) or obesity (fat tissue produces estrogen).

Medical History

• Lynch syndrome (hereditary colorectal cancer syndrome).
• Personal/family history of breast or ovarian cancer.
• Endometrial hyperplasia (thickened uterine lining).
• Diabetes or hypertension.

Lifestyle Factors

• Obesity (body mass index ≥ 30).
• Tamoxifen use (for breast cancer treatment).
• Diet high in animal fats.

Protective factors: Pregnancy, oral contraceptives, and regular exercise may lower risk.

Diagnosis

Diagnosis involves a combination of tests:

1. Pelvic exam: Checks for uterine abnormalities.
2. Transvaginal ultrasound: Measures endometrial thickness (postmenopausal women: >4mm may warrant further testing).
3. Endometrial biopsy: Tissue sample analyzed for cancer cells (gold standard for diagnosis).
4. Dilation and curettage (D&C): If biopsy is inconclusive, this procedure removes more tissue for testing.
5. Imaging tests: CT/MRI scans to determine cancer spread (staging).

Staging (I–IV) guides treatment, with Stage I (confined to uterus) having the best prognosis.

Treatment Options

Treatment depends on cancer type, stage, and overall health. Options include:

Surgery

• Hysterectomy: Removal of the uterus (and often ovaries/fallopian tubes).
• Lymph node dissection: Checks for cancer spread.

Radiation Therapy

• External beam radiation or brachytherapy (internal radiation) to kill cancer cells.

Chemotherapy

• Drugs like carboplatin/paclitaxel for advanced or recurrent cancer.

Hormone Therapy

• Progestin therapy (e.g., megestrol) for early-stage or recurrent cancer.

Targeted Therapy

• Drugs like pembrolizumab (for mismatch repair-deficient tumors).

Clinical trials may offer access to emerging treatments (e.g., immunotherapy).

Living with Uterine Cancer

Managing symptoms and side effects improves quality of life:

• Pain management: Over-the-counter (e.g., ibuprofen) or prescribed medications.
• Nutrition: High-fiber, low-fat diet to support recovery.
• Exercise: Gentle activities (e.g., walking) to reduce fatigue.
• Emotional support: Counseling or support groups (e.g., American Cancer Society).

Follow-up care includes regular pelvic exams and imaging to monitor recurrence.

Prevention

While not all cases are preventable, these steps may reduce risk:

• Maintain a healthy weight (BMI 18.5–24.9).
• Use combined hormonal contraceptives (estrogen + progestin).
• Exercise regularly (≥150 minutes/week of moderate activity).
• Avoid unopposed estrogen therapy after menopause.
• Discuss genetic testing if family history suggests Lynch syndrome.

Complications

If untreated, uterine cancer may lead to:

• Metastasis: Spread to lymph nodes, lungs, liver, or bones.
• Severe anemia from chronic bleeding.
• Bowel/bladder obstruction (advanced stages).
• Reduced fertility (if uterus/ovaries are removed).

When to Seek Emergency Care

Sources

• American Cancer Society. (2023). Endometrial Cancer.
• Mayo Clinic. (2022). Uterine Cancer.
• National Cancer Institute. (2023). Uterine Cancer Treatment.