Could endoscopy have missed detecting a Zenkers diverticulum?
It definitely can because it happened to me. After I had swallowing problems I had an endoscopy and manometry done. I was given reflux medicine, a steroid spray, and prednisone. None of that worked. After a year of this I went in for a cine esophagram and found out that I have a zener’s diverticulum. The esophagram showed it clear as a bell and I understand it it is usually how a ZD is detected.