Zenker's diverticulum Pharyngoesophageal

• Facts:
  Caused by motor dysfunction and incoordination
  Develops above the UES, by herniating posteriorly between the fibers of cricopharyngeal muscle
• History / PE:
  Neck mass
  Oropharyngeal dysphagia
  Regurgitation
  Foul-smelling breath
  
• Diagnosis:
  Barium swallow (contrast esophagram)
• Treatment:
  Cricopharyngeal myotomy
• Complications:
  Tracheal compression
  Regurgitation
  Pulmonary aspiration