Mid-Esophageal Diverticulum
An outpouching in the middle of the esophagus
Quick Facts
- Type: Structural esophageal condition
- Location: Middle third of the esophagus
- Common cause: Traction from chest scarring or motility problems
- Often: Small and without symptoms
Overview
A mid-esophageal diverticulum is a pouch, or outpouching, that develops in the wall of the middle section of the esophagus, the muscular tube that carries food from the throat to the stomach. The wall of the esophagus bulges outward, creating a small sac where it does not normally exist.
Diverticula in this location are often described as traction diverticula because they were historically caused by inflamed lymph nodes or scar tissue in the chest pulling on the esophageal wall. Many mid-esophageal diverticula are small and cause no symptoms, and they may be discovered by chance during tests done for other reasons. When they do cause problems, treatment focuses on both the pouch and any underlying swallowing disorder.
Understanding where a diverticulum sits along the esophagus matters, because the cause, the symptoms, and the best treatment differ depending on the location. A pouch in the middle of the esophagus behaves differently from one in the upper part near the throat or in the lower part just above the diaphragm. For this reason, doctors carefully map the position and size of the pouch and look closely for any swallowing disorder that may have allowed it to form.
Symptoms
Many people with a mid-esophageal diverticulum have no symptoms at all. When symptoms occur, they may include:
- Difficulty swallowing (dysphagia), with a sense that food sticks in the chest
- Regurgitation of food, sometimes hours after eating
- Chest discomfort or pressure behind the breastbone
- Bad breath caused by trapped, decaying food
- Cough, particularly when lying down
Symptoms often relate more to an underlying esophageal motility problem than to the pouch itself. Rarely, food retained in the pouch can be inhaled into the lungs, leading to recurrent chest infections.
Causes
Mid-esophageal diverticula arise in two main ways:
- Traction: Inflammation and scarring of lymph nodes in the chest, historically from infections such as tuberculosis, pull on the esophageal wall and tug it outward.
- Pulsion: High pressure inside the esophagus from a swallowing disorder pushes the lining outward through a weak point. This is increasingly recognized as a common mechanism.
Underlying motility disorders, in which the esophageal muscles do not coordinate normally, are frequently present. Conditions such as achalasia and diffuse esophageal spasm can raise pressure inside the esophagus and contribute to pouch formation.
Risk Factors
- An underlying esophageal motility disorder
- Past chest infections that caused lymph node scarring
- Older age, as motility problems become more common
- A history of long-standing swallowing difficulty
Diagnosis
Several tests help confirm a mid-esophageal diverticulum and look for any underlying cause:
- Barium swallow: X-rays taken while you swallow a contrast liquid show the size and location of the pouch.
- Upper endoscopy: A thin camera passed through the mouth lets the doctor view the esophageal lining and the opening of the pouch.
- Esophageal manometry: A test that measures pressure and muscle coordination to detect a motility disorder.
- CT imaging: Sometimes used to assess surrounding chest structures.
Treatment
Treatment depends on whether the diverticulum causes symptoms and whether there is an underlying motility problem.
- Observation: Small, symptom-free diverticula often need no treatment and are simply monitored.
- Treating the underlying disorder: If a motility problem is found, addressing it is central to relieving symptoms.
- Surgery: For larger or troublesome pouches, surgeons can remove the diverticulum (diverticulectomy), sometimes combined with a procedure to relieve high pressure in the lower esophagus.
The right approach is individualized, and minimally invasive techniques are often possible. Treating any underlying swallowing disorder reduces the chance of recurrence.
After treatment, people are usually monitored to make sure swallowing improves and that the pouch does not return. When surgery is performed, recovery includes a gradual return to eating, often starting with liquids and soft foods. Because these diverticula are uncommon, treatment is best carried out by surgeons and gastroenterologists experienced with esophageal disorders, who can tailor care to the size of the pouch and the underlying cause.
Prevention
- There is no specific way to prevent a mid-esophageal diverticulum
- Prompt evaluation and treatment of swallowing disorders may reduce ongoing pressure on the esophageal wall
- Eating slowly and chewing thoroughly can ease symptoms if a pouch is present
- Staying upright for a while after meals may limit regurgitation
When to See a Doctor
See a doctor if you have ongoing difficulty swallowing, food sticking in your chest, or regurgitation of undigested food. These symptoms always deserve evaluation to rule out other esophageal conditions.
- Seek prompt care for unintended weight loss or inability to keep food down
- Get evaluated for repeated chest infections or coughing related to eating
- Seek urgent care for severe chest pain or sudden inability to swallow saliva
Frequently Asked Questions
Is a mid-esophageal diverticulum dangerous?
Most are small and cause no symptoms, so they are not dangerous and may never need treatment. Larger pouches can trap food and occasionally lead to regurgitation or chest infections, in which case treatment may be recommended.
What causes a diverticulum in the middle of the esophagus?
It can form when scarring from past chest inflammation pulls the esophageal wall outward, or when high pressure from a swallowing disorder pushes the lining out through a weak spot. An underlying motility problem is often present.
Do mid-esophageal diverticula need surgery?
Not usually. Small, symptom-free pouches are simply monitored. Surgery is reserved for larger diverticula that cause significant swallowing problems, regurgitation, or recurrent lung infections, and it often includes treating any underlying motility disorder.
How is a mid-esophageal diverticulum diagnosed?
A barium swallow X-ray usually shows the pouch, and an upper endoscopy lets the doctor view it directly. Esophageal manometry, which measures muscle pressure, is often done to check for an underlying motility disorder.
Can it cause food to come back up?
Yes. If the pouch is large enough to trap food, you may regurgitate undigested food hours after eating, sometimes with bad breath. This food can occasionally be inhaled, so persistent symptoms should be evaluated.
References
- MedlinePlus, U.S. National Library of Medicine. Esophagus disorders.
- American College of Gastroenterology. Esophageal motility disorders.
- Mayo Clinic. Dysphagia.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Digestive diseases.