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单词 Adhesive otitis media
释义

Adhesive otitis media

英语百科

Tympanic membrane retraction

Tympanic membrane retraction describes a condition in which a part of the eardrum lies deeper within the ear than its normal position.

The eardrum comprises two parts, the pars tensa, which is the main part of the eardrum, and the pars flaccida, which is a smaller part of the eardrum located above the pars tensa. Either or both of these parts may become retracted. The retracted segment of eardrum is often known as a retraction pocket. The terms “atelectasis” or sometimes “adhesive otitis media” can be used to describe retraction of a large area of the pars tensa.

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