Thank you very much for the response. To answer your questions: (1) I am no longer taking any drops. (I was given some post-op, but assumed they were only to be used until the eardrum healed.) (2) I am returning after I receive an MRI (presently scheduled for next week). (3) At the moment, the people at Clinic cannot figure out why the clicking is continuing after the surgery. If you look at the third page of my audiometry or impedence report, you will see on page 3 that the reflex decay charts showing that there was a movement of the eardrum when I heard the clicking. (The circles show where I raised my finger during the test, indicating I was hearing the clicking sound.) However, I am told that the next report showed no such movement and yet, I was still hearing the clicking. (4) I have discussed the patulous issue with my doctor, but more concerning was the ETD, not the clicking. (5) As to the possibility of a sensorineural problem, I suspect that might explain the reduction in the quality of hearing, but I am not sure how it would cause the clicking. (6) As stated above, I will have an MRI in a couple of weeks. (I did have a CT scan done back when my only complaint was ETD, and they told it was fine. That, I assume, will answer the acoustic neuroma issue, although my doctor said he thought it was doubtful that the MRI would indicate a problem. (7) I am not having problems with the other ear. I hear clearly through it and do not have the same clicking problems. (Once in a long while, I might listen to a single click, but it does not appear to be the same thing.) (8) I do not smoke and never have, although I was surrounded by significant secondhand smoke during my childhood and early teen years. (9) I do not know the answer to your question regarding endoscopically versus microscope. I am also attaching a fairly long summary of my symptoms that I prepared a few days ago. It will give more detail. Thanks.