This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophagus, Subject name: Surgery
Which is most common site for iatrogenic esophageal perforation? 
Select and explain. 
A. Abdominal poion, B. Cervical poion, C. Above arch of aoa, D. Below arch of aoa
B: Cervical poion
Answer: B: Cervical poion 
Explanation: Esophageal perforation Iatrogenic Spontaneous Most common type Caused by endoscopy MC site is cervical esophagus (cricopharyngeal area) Esophageal rupture after vomiting MC site: left posterolateral side of the distal esophagus