Esophageal cancer
From MayoClinic.com Special to CNN.com

Introduction

 

The hard-drinking, chain-smoking lifestyle of mid-20th-century Hollywood took a huge toll — hundreds of noted actors eventually lost their lives to lung, throat or esophageal cancer. One of them was Humphrey Bogart, who died of esophageal cancer at age 57.

Less well known than lung cancer, but no less serious, esophageal cancer starts in the inner layer of the esophagus, the 10-inch long tube that connects your throat and stomach. The most common symptom, which usually occurs late in the disease, is difficulty swallowing and a sensation of food sticking in your throat or chest.

In Bogie's day, the outlook for people with esophageal cancer was poor. But survival rates have improved, in part because close monitoring of Barrett's esophagus — a serious, premalignant complication of acid reflux disease — can help detect cancer early, when it's more likely to respond to treatment. Even more important is that diet and lifestyle changes can significantly reduce the chances of ever developing this type of cancer.

 

Signs and symptoms

 

It's unusual to have signs and symptoms of esophageal cancer in the early stages of the disease. When cancer is more advanced, you may experience:

 

Causes

 

Although the esophagus is essentially a hollow tube, its walls are composed of a number of highly specialized layers, including an inner lining made up of thin, flat cells (squamous cells), a layer below the inner lining (submucosa) that contains mucus-secreting glands, and a thick band of muscle tissue.

When you eat or drink, a muscle in the upper part of your esophagus (upper esophageal sphincter) relaxes, allowing food and liquid to enter. Smooth muscles in the esophagus wall then move the food along in a series of rhythmic contractions — a process called peristalsis. It usually takes four to 10 seconds for food to flow through your esophagus.

Another ring of muscle, the lower esophageal sphincter, sits at the junction where your esophagus and stomach connect. It opens to allow food into your stomach and then clamps shut so that corrosive stomach acids and digestive enzymes don't back up into the esophagus.

 

 

Cancer can occur almost anywhere along the length of the esophagus and is classified according to the types of cells in which it originates:

Contributing factors
Healthy cells grow and divide in an orderly way. This process is controlled by DNA — the genetic material that contains the instructions for every chemical process in your body. When DNA is damaged, changes occur in these instructions. One result is that cells may begin to grow out of control and eventually form a tumor — a mass of malignant cells.

Although researchers don't know all the causes of esophageal cancer, they have identified several factors that can damage DNA in your esophagus. These factors include:

Sometimes esophageal cancer is associated with certain rare medical conditions, including:

 

Risk factors

 

Heavy drinking, smoking and chronic acid reflux or Barrett's esophagus are the greatest risk factors for esophageal cancer.

Other factors that may increase your chances of developing esophageal cancer include:

 

When to seek medical advice

 

See your doctor if you have difficulty swallowing, a chronic cough or unintended weight loss. Having these signs and symptoms doesn't mean you have esophageal cancer. A number of other conditions can cause similar problems, and your doctor can perform tests to help determine the cause.

Also seek treatment if you experience chronic heartburn, which can cause inflammation in your esophagus and increase your risk of esophageal cancer. In many cases, you can control mild or moderate heartburn by changing your diet and using over-the-counter antacids. When these measures aren't enough, your doctor may recommend stronger medications.

Signs and symptoms of gastroesophageal reflux include:

 

Screening and diagnosis

 

To help find the cause of your symptoms, your doctor will take a complete medical history and perform a physical exam. You're also likely to have a chest X-ray and other diagnostic tests, such as:

Screening tests
Screening tests check for a disease in its early stages, before you develop symptoms. If you're at high risk of esophageal cancer, especially if you have Barrett's esophagus or tylosis, you're likely to have regular endoscopic examinations and biopsies. Many doctors recommend having these tests every two to three years if you don't have cell abnormalities (dysplasia). When cell abnormalities are present, you'll usually need tests more often.

Staging tests
If cancer is diagnosed, you're likely to have more tests to determine whether and where the cancer has spread (metastasized), a process known as staging. This step is especially important because it helps your doctor determine the most appropriate treatment. Esophageal cancers are staged using the numbers 0 through IV. In general, the higher the number the more advanced the cancer.

To help stage esophageal cancer, you may have one or more of these tests:

 

Complications

 

As esophageal cancer advances, the tumor may block more and more of your esophagus, making swallowing increasingly difficult. Eventually, some people aren't able to swallow their own saliva. To help make swallowing easier or reduce the size of the tumor, your doctor may stretch your esophagus with a balloon-like device, vaporize the tumor with a laser or insert a stainless steel or plastic tube (stent) to hold your esophagus open.

Other complications of esophageal cancer include:

 

Treatment

 

Treatment for esophageal cancer depends on the type, location and stage of cancer as well as on your age, overall health and personal preferences. Decisions about therapy can be particularly complicated because various combinations of surgery, chemotherapy and radiation may be more effective than any single treatment. When cancer is advanced, choosing a treatment plan is a difficult decision, and it's important to take time to evaluate your choices.

You may also want to consider seeking a second opinion. This can provide additional information to help you feel more certain about the option you're considering.

The goal of treatment is to eliminate the cancer completely. When that isn't possible, the focus may be on preventing the tumor from growing or causing more harm. In some cases, an approach called palliative care may be best. Palliative care refers to treatment aimed not at removing or slowing the disease, but at helping relieve symptoms and making you as comfortable as possible.

Surgical options
Surgery is the most common treatment for esophageal cancer, either as a therapy for the cancer itself or as a way to relieve symptoms, especially difficult swallowing. It's also recommended if you consistently have very abnormal cells (high-grade dysplasia) occurring with Barrett's esophagus.

Depending on the nature of the cancer, the operation may be performed in one of two ways:

Surgery for esophageal cancer is complex and carries risks that include infection, bleeding and leakage from the area where the remaining esophagus is reattached. Hospitals where surgeons perform a large number of esophagectomies have significantly lower mortality rates than do hospitals where few esophagectomies are performed. If you're considering this surgery, look for a hospital or medical center whose surgeons are highly experienced in the procedure.

Chemotherapy
Using drugs to kill cancer cells is another option for treating esophageal cancer. Chemotherapy medications, which can be injected into a vein or taken by mouth, travel throughout your body, attacking cancer cells that have spread beyond your esophagus. You usually receive a combination of anticancer drugs given in cycles, with periods of recovery alternating with periods of treatment.

Chemotherapy can help in several ways — before surgery to shrink the tumor, in combination with radiation when surgery isn't an option or to relieve symptoms in advanced cases of esophageal cancer.

Unfortunately, anticancer drugs affect normal cells as well as malignant ones, especially fast-growing cells in your digestive tract and bone marrow. For that reason, side effects — including nausea and vomiting, mouth sores, an increased chance of infection due to a shortage of white blood cells, and fatigue — are common. Not everyone experiences side effects, however, and there are now better ways to control them if you do. Be sure to discuss any questions you may have about side effects with your treatment team.

Radiation therapy
Radiation is usually most effective against esophageal cancer when used in combination with chemotherapy, either before surgery or as the primary treatment. It's also used to relieve pain and improve swallowing. Most often, the radiation comes from a machine outside your body (external beam radiation), but sometimes thin plastic tubes containing radioactive material are implanted near the cancer cells in your esophagus (brachytherapy).

You commonly receive radiation therapy five days a week for five to seven weeks. The most common side effects are fatigue — which generally becomes more noticeable later in the course of treatment — skin rash or redness in the area being treated, loss of appetite, and mouth sores or increased problems with swallowing. In fact, swallowing may become so difficult that your doctor will recommend a feeding tube to provide nourishment during treatment.

These side effects generally aren't permanent, and most can be treated or controlled. Long-term side effects are rare, but they can be serious when they do occur and include inflammation or scarring in the lungs, esophagus, heart or spinal cord.

Photodynamic therapy
This therapy is generally used to relieve pain and obstruction in the esophagus, but it's also being studied as a treatment for early-stage esophageal cancer. During the procedure, you receive an injection of a light-sensitive drug that remains in cancer cells longer than it does in healthy ones. A laser light is then directed at your esophagus through an endoscope. This stimulates the production of an active form of oxygen that destroys the cancer cells while sparing healthy tissue.

Photodynamic therapy isn't without side effects. It makes your skin and eyes sensitive to light for at least six weeks after treatment, so you'll need to wear protective clothing and sunglasses every time you go outdoors. It can also make swallowing more difficult for a short period of time.

Areas of research
Scientists are continually seeking more effective and less harmful treatments for esophageal cancer. Some areas of research include:

Clinical trials
If you have advanced esophageal cancer, you may want to consider participating in a clinical trial. This is a study that's used to test new forms of therapy — typically new drugs, different approaches to surgery or radiation treatments, and novel methods such as photodynamic therapy. If the therapy being tested proves to be safer or more effective than current treatments, it will become the new standard of care.

The treatments used in clinical trials haven't yet been shown to be effective. They may have serious or unexpected side effects, and there's no guarantee you'll benefit from them.

On the other hand, cancer clinical trials are closely monitored by the federal government to ensure they're conducted as safely as possible. And they offer access to treatments that wouldn't otherwise be available to you.

If you're interested in finding out more about clinical trials, talk to your treatment team. You can also call the National Cancer Institute's Cancer Information Service at (800) 4-CANCER, or (800) 422-6237. The call is free, and trained specialists are available to answer your questions.

 

Prevention

 

Although it's not possible to prevent all cases of esophageal cancer, the following lifestyle changes can greatly reduce your risk:

 

Self-care

 

Poor appetite, difficulty swallowing, weight loss and weakness are often problems for people with esophageal cancer. These symptoms may be compounded by cancer treatments and by the need for a liquid diet, tube feeding or intravenous feeding during the course of your treatment as well as by the emotional toll of living with the disease.

When you're able to eat more normally, your doctor may recommend talking to a registered dietitian who can help you find ways to get the nourishment you need. These suggestions also may help:

 

Coping skills

 

Learning you have any life-threatening illness can be devastating. But coping with a diagnosis of esophageal cancer can be especially difficult. The more advanced the disease when it's discovered, the less likely the chance of real recovery. As a result, you may feel especially overwhelmed just when you need to make crucial decisions. Although there are no easy answers for people dealing with esophageal cancer, some of the following suggestions may help:

 

Complementary and alternative medicine

 

More and more people are interested in nontraditional approaches to healing, especially when standard treatments produce intolerable side effects or aren't able to provide a cure. To address this growing interest, the National Institutes of Health established the National Center for Complementary and Alternative Medicine (NCCAM) in 1992. The center's mission is to explore nontraditional therapies in a scientifically rigorous way. In 1999 NCCAM teamed up with the National Cancer Institute specifically to look at the role complementary and alternative medicine may play in the treatment of cancer. In general, alternative medicine refers to therapies that may be used instead of conventional treatments. Complementary or integrative medicine, on the other hand, usually means therapies used in conjunction with traditional treatments.

Rather than simply addressing a problem with the body, complementary and alternative treatments often focus on the entire person — body, mind and spirit. As a result, they can be especially effective at reducing stress, alleviating the side effects of conventional treatments such as chemotherapy and improving quality of life.

NCCAM's findings are available on its Web site. You can also talk to information specialists at NCCAM's clearinghouse by calling (888) 644-6226 between 8:30 a.m. and 5 p.m. EST.

 

May 13, 2005