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macroglossia
Macroglossia is the medical term for an unusually large tongue. Severe enlargement of the tongue can cause cosmetic and functional difficulties including in speaking, eating, swallowing and sleeping. Macroglossia is uncommon, and usually occurs in children. There are many causes. Treatment is dependent upon the exact cause.
==Classification==
The ICD-10 lists macroglossia under "other congenital malformations of the digestive system". Definitions of macroglossia have been proposed, including "a tongue that protrudes beyond the teeth during () resting posture" and "if there is an impression of a tooth on the lingual border when the patients slightly open their mouths".〔 Others have suggested there is no objective definition of what constitutes macroglossia. Some propose a distinction between ''true macroglossia'', when histologic abnormalities correlate with the clinical findings of tongue enlargement, and ''relative macroglossia'', where histology does not provide a pathologic explanation for the enlargement. Common examples of true macroglossia are vascular malformations, muscular enlargement and tumors; whilst Down syndrome is an example of relative macroglossia.〔 ''Pseudomacryglossia'' refers to a tongue that is of normal size but gives a false impression of being too large in relation to adjacent anatomical structures. The Myer classification subdivides macroglossia into generalized or localized.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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