Oesophageal carcinoma is a growth of cells that starts in the long, hollow tube connecting the throat to the stomach. Although early stages often go unnoticed, this cancer can cause difficulty swallowing, chest pain, and weight loss as it progresses. Understanding the symptoms, risk factors, and ways to reduce your risk can help you take charge of your health.
Understanding Oesophageal Carcinoma
Oesophageal carcinoma, also called esophageal cancer depending on where you live, begins in the tissues of the oesophagus. The oesophagus is a muscular tube that helps move food from the back of your throat down to your stomach for digestion. This cancer typically starts in the cells that line the inside of the oesophagus and can occur anywhere along its length.[1]
This cancer can be quite aggressive. One of the reasons it poses such a challenge is that many people do not notice symptoms until the disease has already advanced. Your oesophagus is very flexible and naturally stretches to make room for large bites of food. As a tumour grows, the oesophagus expands around it, which is why early symptoms are often absent. By the time difficulty swallowing becomes noticeable, the tumour may already be blocking a significant portion of the tube.[2]
There are two main types of oesophageal carcinoma. Adenocarcinoma is the most common type in the United States and typically develops in the tissue that makes mucus to help you swallow. It usually affects the lower part of the oesophagus, near the stomach. Squamous cell carcinoma begins in the flat cells that line the oesophagus and can occur in the upper and middle sections, though it can appear anywhere along the tube.[2][5]
How Common Is Oesophageal Carcinoma?
Oesophageal carcinoma is the tenth most common cancer in the world. While not as widespread as some other cancers, it carries a serious burden. In the United States, it is the fourth most common cancer of the digestive system, following colorectal, pancreatic, and liver cancers. It also has the third-highest death rate among digestive system cancers.[2][4]
Approximately four in every one hundred thousand people in the United States are affected by oesophageal cancer. The disease most commonly affects men who are sixty years old or older. There are also differences in how the disease presents across different racial and ethnic groups. People who are Black or Asian with this condition are more likely to have squamous cell carcinoma, while people who are white are more likely to develop adenocarcinoma.[2]
Over recent decades, interesting patterns have emerged. The incidence of squamous cell carcinoma has been declining in the United States, while adenocarcinoma has been rising significantly. This increase in adenocarcinoma is particularly notable among white men and is closely linked to conditions like gastroesophageal reflux disease and a condition called Barrett’s oesophagus.[4][7]
What Causes Oesophageal Carcinoma?
Healthcare providers do not know the exact cause of oesophageal carcinoma, but they have identified numerous factors that increase the risk. The causes differ somewhat depending on the type of cancer. For squamous cell carcinoma, the main contributors include smoking, heavy alcohol consumption, and a diet low in fruits and vegetables. Chewing betel nut and consuming very hot drinks also raise the risk.[4][7]
Adenocarcinoma, on the other hand, is most often linked to conditions that affect the lower oesophagus. Gastroesophageal reflux disease (GERD) occurs when stomach acid frequently flows back into the oesophagus, causing irritation and inflammation. Over time, this repeated damage can lead to a condition called Barrett’s oesophagus, where the normal cells lining the lower oesophagus change into abnormal cells that resemble those in the intestine. Barrett’s oesophagus significantly increases the risk of developing adenocarcinoma.[4][5]
Other contributing factors for adenocarcinoma include smoking, obesity, and having a high body mass index. Being overweight or obese can cause inflammation in the oesophagus that may eventually turn into cancer.[2][7]
Who Is at Risk?
Several groups of people face a higher risk of developing oesophageal carcinoma. Tobacco use, whether through smoking or using smokeless tobacco, is one of the most significant risk factors. Chronic and heavy alcohol use also substantially increases risk, particularly for squamous cell carcinoma.[2][5]
Age is another important factor. Oesophageal cancer typically affects older adults, with the median age at diagnosis being sixty-eight years. Men are approximately three times more likely than women to develop this cancer.[2][4]
People with Barrett’s oesophagus are at particularly high risk. This condition develops when chronic acid reflux damages the lining of the oesophagus over time. Heartburn, the burning sensation in the chest caused by stomach acid, is the most common symptom of GERD and the leading cause of Barrett’s oesophagus. If you experience frequent or severe heartburn, it is important to speak with your healthcare provider about ways to manage it and reduce your risk.[2][5]
Obesity plays a role as well. Carrying excess weight, especially around the abdomen, can increase pressure on the stomach and worsen acid reflux. This ongoing irritation contributes to inflammation that may eventually lead to cancer.[7]
Recognising the Symptoms
Oesophageal carcinoma often does not cause noticeable symptoms in its early stages. As the disease advances, however, symptoms begin to appear. The most common early symptom is difficulty swallowing, also known as dysphagia. This happens when the growing tumour starts to block the oesophagus. At first, you might notice trouble swallowing solid foods, but as the blockage worsens, even liquids may become difficult to swallow.[1][2]
Other symptoms include chest pain, pressure, or a burning sensation. This pain may be felt behind the breastbone or between the shoulder blades. Some people also experience pain specifically when swallowing.[1][2]
Weight loss without trying is another common sign. This can happen because difficulty swallowing makes it hard to eat enough food. The cancer itself can also change how your body uses energy, causing you to burn calories faster and lose weight even if you are trying to eat normally.[1][2]
Additional symptoms may include worsening indigestion or heartburn, a hoarse voice, a chronic cough that does not go away, and in more severe cases, coughing up or vomiting blood. You might also notice a lump under the skin near your collarbone, which could indicate that the cancer has spread to nearby lymph nodes.[1][2][7]
If you experience any of these symptoms, especially difficulty swallowing that persists or worsens, it is important to see your doctor as soon as possible. While these symptoms can be caused by conditions other than cancer, it is essential to get them checked out.[1]
How Oesophageal Carcinoma Develops in the Body
Oesophageal carcinoma begins when the normal cells that line the inside of the oesophagus begin to change and grow out of control. These cancerous cells multiply rapidly, eventually forming a tumour. The wall of the oesophagus is made up of several layers, including the inner lining, muscle, and connective tissue. Cancer typically starts in the innermost layer and then spreads outward through the other layers as it grows.[5][15]
The oesophagus has a rich network of lymphatic channels, which are small vessels that carry a fluid called lymph throughout the body. These channels are concentrated in the inner layers of the oesophagus and drain along its length. Because of this extensive network, oesophageal cancer can spread relatively easily to nearby lymph nodes. When cancer cells enter the lymphatic system, they can travel to lymph nodes in the chest and abdomen, and eventually to more distant parts of the body.[15]
As the tumour grows, it begins to interfere with the normal function of the oesophagus. The oesophagus is designed to move food down to the stomach through wave-like muscle contractions called peristalsis. A growing tumour can block this passage, making swallowing progressively more difficult. In advanced cases, the blockage can become so severe that even liquids cannot pass through.[2]
If the cancer continues to grow without treatment, it can spread beyond the oesophagus to nearby structures such as the lungs, liver, distant lymph nodes, bones, and the lining of the abdomen called the peritoneum. When cancer spreads to the peritoneum, it can cause fluid buildup in the abdomen, abdominal pain, severe loss of appetite, and bowel problems.[4]
Preventing Oesophageal Carcinoma
While not all cases of oesophageal carcinoma can be prevented, there are several steps you can take to significantly reduce your risk. The most important preventive measure is to stop using tobacco in any form. If you smoke or use smokeless tobacco, quitting is one of the best things you can do for your oesophageal health and your overall well-being.[5][7]
Limiting alcohol consumption is equally important. Chronic and heavy use of alcohol increases the risk of squamous cell carcinoma. If you drink, do so in moderation, or consider avoiding alcohol altogether.[5]
Maintaining a healthy weight can also help reduce your risk, particularly for adenocarcinoma. Obesity contributes to acid reflux and inflammation in the oesophagus, both of which are risk factors for this type of cancer. Eating a balanced diet rich in fruits and vegetables provides your body with important nutrients and antioxidants that may help protect against cancer. A poor diet low in these foods has been linked to a higher risk of squamous cell carcinoma.[4][7]
Managing GERD and chronic heartburn is critical. If you experience frequent acid reflux, work with your doctor to find effective treatments. Lifestyle changes such as avoiding foods that trigger reflux, eating smaller meals, not lying down immediately after eating, and raising the head of your bed can all help. In some cases, medication may be necessary to control stomach acid production.[5]
If you have been diagnosed with Barrett’s oesophagus, regular monitoring and follow-up with your healthcare provider are essential. While Barrett’s oesophagus increases cancer risk, not everyone with this condition will develop cancer. Your doctor may recommend surveillance with periodic endoscopy to check for any changes that could indicate the development of cancer.[5]
