the cases further demonstrate that the same tympanometric pattern can be recorded from ears with different pathologies ( e.g. , tympanic membrane perforation with cholesteatoma , tympanic membrane retraction , ossicular adhesions , and middle ear effusion ) , and conversely , that the same pathology can result in different tympanometric shapes ( e.g. , tympanic membrane perforation , middle ear effusion , and otosclerosis ) .
C0013443
ears
C0029883
middle ear effusion