<prompt> 65 year old patient comes with dysphagia and regurgitation. Barium swallow shows diverticula at lower oesophagus. Which of the following is false about this conditionEndoscopy is used to rule out malignancyChest x ray shows air fluid level in posterior mediastinumIt arises from killians triangleTreatment is resection Plus myotomy  <response>: This is the case of epiphanic diverticulum. It is usually seen in lower oesophagus. It is confused with para esophageal hernia. 