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Oral mucocele (also termed mucous retention cyst, mucous extravasation cyst, mucous cyst of the oral mucosa, and mucous retention and extravasation phenomena) is a clinical term that refers to two related phenomena: * Mucus extravasation phenomenon * Mucus retention cyst The former is a swelling of connective tissue consisting of a collection of fluid called mucin. This occurs because of a ruptured salivary gland duct usually caused by local trauma (damage), in the case of mucus extravasation phenomenon, and an obstructed or ruptured salivary duct (Parotid duct) in the case of a mucus retention cyst. The mucocele has a bluish translucent color, and is more commonly found in children and young adults. Although the term cyst is often used to refer to these lesions, mucoceles are not strictly speaking true cysts because there is no epithelial lining. Rather, it would be more accurate to classify mucoceles as polyps (i.e. a lump).〔(【引用サイトリンク】title=Dorlands Medical Dictionary:mucocele )〕 ==Signs and symptoms== The size of oral mucoceles vary from 1 mm to several centimeters and they usually are slightly transparent with a blue tinge. On palpation, mucoceles may appear fluctuant but can also be firm. Their duration lasts from days to years, and may have recurrent swelling with occasional rupturing of its contents. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oral mucocele」の詳細全文を読む スポンサード リンク
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