Barrett's oesophagus

Understanding barrett's oesophagus

What Barrett's oesophagus is

The oesophagus is normally lined with flat, pale cells that are not built to withstand acid. After years of repeated reflux, the lining in the lower oesophagus can adapt, replacing itself with a more robust, intestine-like lining. That adaptation is Barrett's oesophagus.

In one sense it is the body protecting itself, because the new lining tolerates acid better. The trade-off is that this altered tissue carries a small risk of further change over time.

Understanding barrett's oesophagus

Who develops it

Barrett's is strongly linked to long-standing reflux. Risk is higher with:

• Reflux symptoms lasting more than five years
• Being male, and being over 50
• Carrying excess weight around the abdomen
• Smoking
• A family history of Barrett's or oesophageal cancer

Understanding barrett's oesophagus

Symptoms

Barrett's itself causes no symptoms. People are diagnosed because they had an endoscopy for reflux, not because the Barrett's announced itself.

Somewhat confusingly, some people find their heartburn improves as Barrett's develops, because the new lining is less sensitive to acid. Improving symptoms therefore do not mean the reflux has resolved.

Understanding barrett's oesophagus

The real level of risk

This is where reassurance matters, because the diagnosis frightens people more than the facts warrant.

Barrett's oesophagus is not cancer. The great majority of people who have it will never develop oesophageal cancer, and the annual risk of progression is low. What Barrett's does is identify a group worth keeping an eye on, which is a good position to be in rather than a frightening one.

Risk rises if biopsies show changes called dysplasia, where the cells are beginning to behave abnormally. Dysplasia is graded low or high, and both are treatable, which is exactly the point of finding them early.

Understanding barrett's oesophagus

Diagnosis and surveillance

Barrett's is diagnosed at gastroscopy. The altered lining has a distinctive appearance, and biopsies confirm it and check for dysplasia.

If confirmed, you enter a surveillance programme: a repeat gastroscopy at intervals determined by the length of the affected segment and whether any dysplasia was found. For non-dysplastic Barrett's the interval is typically a few years; where dysplasia is present, it is much shorter.

Surveillance is not a formality. It is the mechanism by which a treatable change is caught before it becomes a serious one.

Understanding barrett's oesophagus

Treatment

For Barrett's without dysplasia, treatment focuses on controlling the reflux that caused it, usually with long-term acid-reducing medication and the same weight, diet and smoking measures that help reflux generally, plus regular surveillance.

Where dysplasia is present, the abnormal tissue can be treated endoscopically, by removing it or by ablation techniques that destroy the altered lining and allow normal tissue to regrow. These are done through the endoscope rather than by open surgery, and are highly effective when the change is caught early.