Fallopian tube cancer stage III is a significant diagnosis that means the disease has spread beyond the pelvis into the abdominal cavity or to nearby lymph nodes. Understanding this stage helps patients and their families know what to expect and what treatment options may be available.

What Does Stage III Mean for Fallopian Tube Cancer?

When doctors diagnose fallopian tube cancer at stage III, they are describing how far the disease has traveled from where it first started. The fallopian tubes are slender ducts that carry eggs from the ovaries to the uterus. Cancer that begins in these tubes can spread to nearby areas, and at stage III, it has moved beyond the pelvis into the abdominal region or reached the lymph nodes in the back of the abdomen.^[2]

Fallopian tube cancer is grouped together with ovarian cancer and primary peritoneal cancer because these three types form in the same kind of tissue, called epithelial tissue, which lines organs and body cavities. They behave similarly and are staged and treated using the same approach. This means that what doctors know about treating ovarian cancer often applies to fallopian tube cancer as well.^[2][9]

Stage III is divided into smaller groups to give a more detailed picture of where the cancer has spread. Stage 3A1 means cancer has reached the lymph nodes at the back of the abdomen, with tumors smaller than 1 centimeter in one subgroup and larger than 1 centimeter in another. Stage 3A2 indicates that cancer cells are present in the lining of the abdominal cavity, called the peritoneum, and possibly in lymph nodes. Stage 3B describes cancer growths in the peritoneum that are 2 centimeters or smaller, with possible lymph node involvement. Stage 3C is when the cancer growths in the peritoneum are larger than 2 centimeters, and cancer may also be on the surface of the spleen or liver or in the lymph nodes.^[2][12]

Causes and Risk Factors

The exact cause of fallopian tube cancer is not fully understood by researchers. However, they know that most of these cancers develop in glands that line organs, specifically in epithelial cells. These are the same cells where most ovarian cancers begin. Most fallopian tube and ovarian tumors are called high-grade serous tumors, which means they grow and spread quickly.^[6]

Several factors can increase a person’s chance of developing fallopian tube cancer. Age plays a role, as more than half of people with this cancer or ovarian cancer are over 63 years old. Where someone lives or their ethnic background can also matter. People in North America or those of Northern European or Ashkenazi Jewish descent have a higher risk.^[6]

Family history is another important factor. If a first-degree biological relative, such as a mother, sister, or daughter, has had breast cancer, ovarian cancer, or fallopian tube cancer, the risk increases. This is partly because some people inherit changes in their genes that raise cancer risk. Mutations in the BRCA1 or BRCA2 genes are well-known for increasing the likelihood of both breast and ovarian-related cancers. Other inherited conditions, like Lynch syndrome and Peutz-Jeghers syndrome, also raise the risk.^[6][7]

Reproductive history matters as well. Women who have never been pregnant or who had their first full-term pregnancy after age 35 are more likely to develop this cancer. Getting a first menstrual period before age 12 or going through menopause later can also increase risk. Additionally, health conditions like endometriosis, where tissue similar to the lining of the uterus grows outside it, is a recognized risk factor.^[6]

Symptoms to Watch For

Fallopian tube cancer is difficult to detect early because symptoms are often absent or very subtle in the beginning stages. Many people do not notice anything wrong until the cancer has spread throughout the abdomen. This makes recognizing symptoms and reporting them to a healthcare provider especially important.^[6]

Common symptoms include pain or a feeling of pressure in the pelvis or abdomen. Some people experience swelling or bloating in the abdominal area. Changes in eating habits can occur, such as feeling full quickly or losing appetite altogether. Nausea may also be present. Bowel habits might change, leading to constipation or diarrhea.^[6]

Urinary symptoms, such as needing to urinate more frequently than usual, can develop. Abnormal vaginal bleeding, especially after menopause, or unusual vaginal discharge that is watery or bloody, should not be ignored. Any of these symptoms, particularly if they persist or worsen, warrant a visit to a healthcare provider.^[6]

How Fallopian Tube Cancer Affects the Body

At stage III, fallopian tube cancer has spread beyond its original location. This spread, called metastasis, occurs when cancer cells break away and travel through the body. In this stage, the cancer typically moves from the fallopian tubes to the peritoneum, the thin tissue lining the abdominal cavity and covering organs inside the abdomen. Cancer can also reach the lymph nodes, which are small bean-shaped structures that filter fluid and help fight infection.^[2]

When cancer spreads to the peritoneum, it can cause fluid to build up in the abdomen, a condition known as ascites. This leads to swelling and discomfort. Cancer growths on the peritoneum can press on or grow into nearby organs, such as the bowels, causing bowel obstruction or other digestive problems. The presence of cancer in lymph nodes can affect the body’s ability to drain fluid and fight infection in those areas.^[2]

The body’s normal functions are disrupted as cancer interferes with how organs work. For example, if cancer affects the bowels, it may become difficult to have regular bowel movements. If it involves the bladder, urination patterns may change. Appetite and weight can be affected because the stomach and intestines do not work as well when cancer is present nearby.^[2]

Treatment Approaches for Stage III

Treating stage III fallopian tube cancer usually involves a combination of surgery and chemotherapy. The specific treatment plan depends on several factors, including where exactly the cancer has spread, whether the surgeon believes all of the cancer can be removed, and the patient’s overall health.^[2]

Surgery is a key part of treatment. A specialist surgeon, called a gynaecological oncologist, typically performs the operation. The goal is to remove as much of the cancer as possible. This may include removing both ovaries, both fallopian tubes, the uterus (including the cervix), and sometimes other tissues where cancer has spread. The surgeon will also check the pelvis and abdomen to see where else cancer may be present and may remove lymph nodes to examine them for cancer. This type of surgery is known as cytoreductive surgery or debulking surgery.^[2]

Chemotherapy is almost always part of the treatment plan for stage III cancer. It may be given after surgery to kill any remaining cancer cells. This is called adjuvant chemotherapy. In some cases, chemotherapy is given before surgery to shrink the cancer, followed by surgery, and then more chemotherapy afterward. This approach is called neoadjuvant chemotherapy with interval cytoreductive surgery. Another option is chemotherapy delivered directly into the abdomen during surgery, known as hyperthermic intraperitoneal chemotherapy or HIPEC.^[2]

Some patients may receive treatment with a targeted cancer drug, depending on their specific situation. Targeted drugs work differently than chemotherapy by focusing on specific characteristics of cancer cells. These may be given along with chemotherapy, on their own, or after chemotherapy has finished.^[2]

If surgery is not possible because the cancer has spread too widely or the patient is not well enough to undergo an operation, chemotherapy alone may be used to shrink the cancer and slow its growth. Other treatments can help relieve symptoms, such as draining fluid from the abdomen if ascites develops, treating bowel obstructions, or using radiotherapy to manage pain.^[2]

Prevention Strategies

While there is no guaranteed way to prevent fallopian tube cancer, certain steps can reduce risk, especially for those with a higher likelihood of developing the disease. Women with an increased risk, such as those with BRCA gene mutations or a strong family history of ovarian or breast cancer, may consider preventive surgery. Removing the ovaries and fallopian tubes, called salpingectomy and oophorectomy, can significantly lower the risk of developing fallopian tube or ovarian cancer.^[7]

Genetic testing can help identify whether someone carries gene mutations that increase cancer risk. Knowing this information allows individuals and their doctors to make informed decisions about monitoring and prevention. Women who are found to have BRCA mutations or other high-risk genetic changes can discuss options like increased surveillance or preventive surgery.^[7]

General health measures, such as maintaining a healthy weight and not smoking, contribute to overall cancer risk reduction. While these do not specifically prevent fallopian tube cancer, they support the body’s overall health and may lower the risk of other cancers and health conditions.^[7]