Otospongiosis/otosclerosis
nEndochondral bone replaced by haversian bone, then less vascular and more solid
n?etiology- measles antibodies in perilymph found, congenital
n85% bilateral, 2:1 F, young adult-middle age, caries ?Ca/PO4 metabolism
nStiffening and eventual fixation of stapediovestibular joint-àCHL
nFenestral vs. retrofenestralàcontinuum
nObliterative- 2%
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