On this page
At a glance
- The pouch forms above a muscle at the top of the esophagus (the cricopharyngeus) that doesn’t relax fully.
- Typical symptoms are food sticking high in the throat, gurgling, bad breath, and regurgitating undigested food.
- A barium swallow is the main test to diagnose it.
- Treatment divides the tight muscle, either through the mouth (endoscopically) or through a neck incision.
What it is
At the top of the esophagus, a band of muscle called the cricopharyngeus acts as the upper esophageal sphincter. It normally relaxes briefly with each swallow. When it stays too tight, the pressure of swallowing pushes the throat lining outward through a naturally weaker area just above it. Over years, a pouch — the diverticulum — develops and slowly enlarges.
Zenker’s diverticulum occurs most often in people in their 60s and older.
Symptoms
- Food or pills sticking high in the throat
- Regurgitating undigested food, sometimes hours after eating or when lying down
- Gurgling sounds in the neck when swallowing
- Persistent bad breath
- Coughing or choking, particularly when lying down
- Weight loss in more advanced cases
Material spilling from the pouch into the airway can cause aspiration pneumonia, which is one of the more serious risks of an untreated diverticulum.
Diagnosis
A barium swallow (esophagram) is the main test. It shows the pouch, its size, and how much it retains. If an upper endoscopy is done, the endoscopist should know about the diverticulum in advance, because the pouch can be entered unintentionally. Evaluation also considers other causes of swallowing difficulty in the throat and esophagus.
Treatment
A small pouch that isn’t causing symptoms may not need treatment. When symptoms are present, treatment focuses on dividing the tight cricopharyngeus muscle (a cricopharyngeal myotomy) so that food passes freely, with or without dealing with the pouch itself.
| Approach | How it’s done | General considerations |
|---|---|---|
| Flexible endoscopic septotomy | Through a flexible endoscope, usually with sedation, the wall between the pouch and the esophagus — which contains the tight muscle — is divided | No incision; often a short recovery; suitable for many older patients; symptoms can recur and the procedure can be repeated |
| Z-POEM | A tunneling technique, similar to POEM for achalasia, used to divide the muscle beneath the lining | A newer variation of endoscopic treatment |
| Rigid endoscopic stapling | A rigid scope through the mouth, under general anesthesia, used to divide and seal the wall | Depends on being able to extend the neck and open the mouth widely enough |
| Open surgery through the neck | The muscle is divided and the pouch removed or suspended through an incision in the side of the neck | More invasive, with a longer recovery; durable results |
Specialists in several fields treat Zenker’s diverticulum — including surgeons, gastroenterologists, and ear, nose, and throat surgeons — and the best approach depends on the size of the pouch, the anatomy of the neck, and overall health.
Dr. Speer’s training includes flexible endoscopic cricopharyngeal myotomy for Zenker’s diverticulum, as described in her professional profile.
Common questions
What is a Zenker’s diverticulum?
It is a pouch that forms where the throat meets the esophagus, above a muscle that doesn’t relax fully, and it traps food and liquid.
Over time, the pressure of swallowing against a tight upper esophageal sphincter pushes the throat lining outward into a pouch. It usually develops in older adults and grows slowly. Food caught in the pouch can come back up hours later, cause gurgling and bad breath, or spill into the airway, especially when lying down. A barium swallow is the key test to diagnose it.
What are the treatment options for Zenker’s diverticulum?
Treatment divides the tight cricopharyngeus muscle — endoscopically through the mouth, with a flexible or rigid scope, or surgically through the neck — and is chosen based on the pouch’s size, your anatomy, and your overall health.
Endoscopic approaches, including flexible endoscopic septotomy and newer tunneling (Z-POEM) techniques, avoid an incision and often allow a quick recovery, which can be especially helpful for older patients. Symptoms can return, and treatment can be repeated. Open surgery through the neck is more invasive but provides a durable result and may suit larger pouches or specific anatomy. Small pouches that don’t cause symptoms may not need treatment at all.
This page is general education. It can’t account for your history, test results, or other conditions, so please discuss your situation with your own clinician.