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
Dohlmans procedure is used for - 
Select and explain. 
A. Zenkers diverticulum, B. Carcinoma esophagus, C. Carcinoma larynx, D. Nasal carcinoma
A: Zenkers diverticulum
Answer: A: Zenkers diverticulum 
Explanation: 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.