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Michel aplasia : ウィキペディア英語版 | Michel aplasia
Michel aplasia, also known as complete labyrinthine aplasia (CLA), is a congenital abnormality of the inner ear. It is characterized by the bilateral absence of differentiated inner ear structures and results in complete deafness (anacusis). Michel aplasia should not be confused with michel dysplasia. 〔Marsot-Dupuch K, Dominguez-Brito A,Ghasli K et-al. CT and MRI findings of Michel anomaly:inner ear aplasia. AJNR Am J Neuroradial. 1999;20(2):281 -4.〕 It may affect one or both ears. ''Aplasia'' is the medical term for body parts that are absent or do not develop properly. In Michel aplasia, the undeveloped (anaplastic) body part is the bony labyrinth of the inner ear. Other nearby structures may be underdeveloped as well.〔 == Epidemiology == Michel aplasia is a rare disease.It was first described by P. Michel in the year 1863.He found it in the autopsy report of an 11 year old child who was deaf and dumb and died in children's hospital of Strasbourg.〔
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