<unk>  (also mucous extravasation cyst, mucous cyst of the<unk>  mucosa, and mucous retention and extravasation phenomena.) is a condition caused by two related phenomena - mucus extravasation phenomenon and mucous retention cyst. Mucous extravasation phenomenon is a swelling of connective tissue consisting of a collection of fluid called mucus. This occurs because of a ruptured salivary gland duct usually caused by local trauma (damage) in the case of mucous extravasation phenomenon and an obstructed or ruptured salivary duct in the case of a mucus retention cyst. The<unk>  has a bluish, translucent color, and is more commonly found in children and young adults. Although these lesions are often called cysts,<unk> s are not true cysts because they have no epithelial lining. Rather, they are polyps.
Oral mucocele
Laryngeal cyst
Median mandibular cyst
Salivary gland fistula
Nasolabial cyst
Enamel pearl
Gingival cyst
Preauricular sinus and cyst