Ovarian cancer begins in the ovaries, which are part of the female reproductive system. The ovaries produce eggs and hormones such as estrogen and progesterone. Ovarian cancer can be challenging to detect early because its symptoms are often subtle and can be mistaken for other conditions.

Types of Ovarian Cancer

Epithelial Ovarian Cancer: The most common type, accounting for about 90% of ovarian cancer cases. It starts in the cells lining the outer surface of the ovary. The most common subtypes include:

• Serous Papillary Carcinoma: The most common subtype, often aggressive.
• Mucinous Carcinoma: Less common, characterized by cells that produce mucus.
• Endometrioid Carcinoma: Often associated with endometriosis.
• Clear Cell Carcinoma: A rarer and often more aggressive subtype.

Germ Cell Tumors: These cancers arise from the egg-producing cells in the ovaries. They are more common in younger women and include:

• Dysgerminoma: The most common germ cell tumor, similar to testicular seminoma.
• Yolk Sac Tumor: Aggressive and more common in young women.
• Teratoma: Can contain different types of tissues, like hair or teeth.
• Choriocarcinoma: Rare and aggressive, associated with abnormal pregnancy.

Sex Cord-Stromal Tumors: These originate in the connective tissue cells that support the ovaries. Subtypes include:

• Granulosa Cell Tumor: Often slow-growing and can produce hormones.
• Sertoli-Leydig Cell Tumor: Can produce male hormones, causing virilization (development of male characteristics).

Symptoms

Ovarian cancer often presents with vague symptoms that can be mistaken for other conditions. Common symptoms include:

• Abdominal Bloating or Swelling: Persistent feeling of fullness or increased abdomen size.
• Pelvic Pain or Discomfort: Pain in the lower abdomen or pelvis.
• Difficulty Eating or Feeling Full Quickly: Reduced appetite or early satiety.
• Frequent Urination: Increased need to urinate or difficulty emptying the bladder.
• Changes in Bowel Habits: Such as constipation or diarrhea.
• Unexplained Weight Loss: Sudden or unexplained loss of weight.
• Fatigue: Persistent tiredness or weakness.

Risk Factors

• Family History: A family history of ovarian cancer, breast cancer, or other cancers can increase risk. Specific genetic mutations, such as BRCA1 and BRCA2, are linked to a higher risk of ovarian cancer.
• Genetic Mutations: Inherited mutations in genes like BRCA1, BRCA2, and Lynch syndrome genes increase the risk.
• Age: The risk increases with age, particularly after menopause.
• Reproductive History: Having no children or having children later in life may slightly increase risk. Conversely, the use of oral contraceptives can reduce risk.
• Endometriosis: A condition where tissue similar to the lining of the uterus grows outside the uterus may increase risk.
• Hormone Replacement Therapy: Long-term use of hormone replacement therapy (HRT) can slightly increase risk.

Diagnosis

• Pelvic Examination: A physical examination to check for abnormalities in the ovaries.
• Imaging Tests: Ultrasound, CT scans, or MRI to visualize the ovaries and detect abnormalities.
• Blood Tests: Measurement of tumor markers such as CA-125, though elevated levels can be due to other conditions and are not definitive for ovarian cancer.
• Biopsy: A tissue sample from the ovary may be obtained for examination. In many cases, a biopsy is performed during surgery.
• Genetic Testing: For those with a family history of cancer or other risk factors, genetic testing may be recommended to identify hereditary cancer syndromes.

Treatment

Treatment depends on the stage and type of ovarian cancer, as well as the patient's overall health. Options may include:

• Surgery: Often the primary treatment, involving the removal of one or both ovaries, the uterus, and possibly nearby lymph nodes. Surgery is usually followed by further treatment based on the cancer's stage.
• Chemotherapy: Uses drugs to kill cancer cells or stop their growth. It is often used after surgery to eliminate remaining cancer cells or as the primary treatment for advanced stages.
• Radiation Therapy: Less commonly used for ovarian cancer but may be applied in specific cases, such as palliation or for localized disease.
• Targeted Therapy: Drugs that target specific molecules involved in cancer growth and spread.
• Hormone Therapy: May be used in certain types of ovarian cancer that are hormone-sensitive.

Prognosis

The prognosis for ovarian cancer depends on several factors, including the stage at diagnosis, the cancer type, and how well the cancer responds to treatment. Early-stage ovarian cancer generally has a better prognosis compared to advanced stages. Ongoing research and advancements in treatment continue to improve outcomes for many patients.

If you have symptoms or are at higher risk, it’s important to consult a healthcare provider for evaluation, diagnosis, and appropriate management.