This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
[{'content': 'Dohlmans procedure is used for - \nSelect and explain. \nA. Zenkers diverticulum, B. Carcinoma esophagus, C. Carcinoma larynx, D. Nasal carcinoma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Zenkers diverticulum Treatment of zenker's diverticulum* Treatment is excision of pouch and cricopharyngealmyotomy. This is done through cervical approach.* Dohlman'sprocedure: - The partition wall bewteen the oesophagus and the pouch is divided by diathermy through an endoscope. This is done in poor risk debilitated patients.* Endoscopic laser treatmentIt is similar to Dohlman's procedure. Partition between the pouch and oesophagus is divided by CO2 laser using operating microscope.", 'role': 'assistant'}]