Esophageal Diverticula

Zenker’s Diverticulum

Midesophageal Diverticulum

Epiphrenic Diverticulum

·         Pharyngoesophageal diverticulum

·         Occurs in older women

·         Posteriorly at site of Killian's dehiscence = superior boundary is thyropharyngeal muscle and inferior boundary is cricopharyngeal muscle

·         Pulsion diverticulum

·         False diverticulum = herniation of mucosa and submucosa through muscular layer

·         May be formed in response to pull from fibrous adhesions following lymph node infection (usually TB)

·         True diverticulum  = contains all 3 esophageal layers

·         Or, may form from increased intraluminal pressure and be pulsion diverticula

·         Location is usually in distal esophagus on lateral esophageal wall, right > left

·         Often associated with hiatal hernia

·         Pulsion diverticulum

·         False diverticulum