"They are located just below the cricopharyngeus muscle, anteriorly and laterally, as left-sided, or less commonly bilateral, outpouching(s) from the cervical oesophagus. High intraluminal pressure due to functional oesophageal obstruction may be the cause for the herniation of mucosa through the potential site of weakness in the lateral oesophageal wall 5."
"They are located just below the cricopharyngeus muscle, anteriorly and laterally, as left-sided, or less commonly bilateral, outpouching(s) from the cervical oesophagus. High intraluminal pressure due to functional oesophageal obstruction may be the cause for the herniation of mucosa through the potential site of weakness in the lateral oesophageal wall 5."