I had an endolymphatic sac decompression/mastoidectomy in 2012. This surgery was one of the worst mistakes of my life. My doctor never mentioned that scar tissue could occur, as this this is supposed to be a rare side-effect. Well, it can’t be that rare. It happened to me. Also, I’ve since had a surgical labyrinthectomy, in 2016. Minus the predictable miserable time immediately after surgery, while in the hospital, I found that recovery from the 2012 surgery was much worse. At one point, I became so ill that it looked like I had two black eyes, and the whites of my eyes became TOTALLY blood red, due to throwing up. If my other ear goes south(which it seems like it is, though more slowly) I’ll go straight for the surgical labyrinthectomy. NO WAY will I have another endolymphatic sac surgery!!!