tympanic membrane retraction
Wikipedia Summary
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...
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