What is the structure of the wall of true esophageal diverticula?
True esophageal diverticula contain contain all layers of the esophageal wall and are unusual.
If present, they are caused by traction on the esophageal wall, pulled out by external Inflam. or fibrosis
Occur in regions of the periesophageal inflammation, typically the midthoracic portion of the esophagus adjacent to the inflamed subcarinal lymph nodes. lower end of Trachea before it splits to R+L bronchi
What is the structure of the wall of false esophageal diverticula?
False (pseudo) diverticula contain only mucosa and submucosal layers of the esophageal wall.
False diverticula are caused by pulsion. They are a manifestation of underlying motility disorders that include hypertonic esophageal peristalsis, failure of sphincter relaxation or both.
Which is the common type of esophageal diverticula?
Pharyngoesophageal diverticulum (Zenker’s Diverticulum) is the most common type of the esophageal diverticula.
It occurs at Killian’s triangle, which is an anatomic weakness in the posterior pharyngeal constrictor muscle just above the cricopharyngeus muscle.
Zenker’s diverticulum is a pulsion defect of the posterior mucosa between the inferior pharyngeal constrictor muscle and the cricopharyngeal sphincter due to simultaneous incoordinate contraction.