cholesteatoma and normal eardrum. retracted and perforated eardrum. otorhinolaryngology

diagram problem medicine cross structure otitis media chronic suppurative pathogen infection normal eardrum inflammation tympanic membrane nornal diseases middle ear acute bulging tympanogram removal surgery eustachian acoustic tympanoplasty disease cholesteatoma retracted perforated otorhinolaryngology human anatomy otolaryngology specialists congenital tube surgical drain wax hole repair sound canal hearing loss fluid