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162526 Isolated congenital auditory ossicle malformation

definition

Isolated congenital auditory ossicle malformation is a rare, congential, middle ear anomaly characterized by, usually unilateral and sporadic, variations in the number, size and/or configuration of the ossicles, with no tympanic membrane and external ear abnormalities and no history of trauma or infection. Patients frequently present late, after schooling has started, with non- progressive, conductive hearing loss often associated with speech delay and poor school performance.