This is a condition where the eardrum has calcium plaques which form as a result of old infections.
Negative pressure builds up in the middle ear from eustachian tube dysfunction.
Long term negative pressure will cause collapse of the ear drum. Negative pressure builds up in the middle ear from eustachian tube dysfunction. Short term negative pressure often causes clear fluid to build up behind the eardrum. Eventually the pocket may trap skin, forming a skin cyst or cholesteatoma. Further progression of retraction pockets can cause destruction of the ear drum.