Oral mucoceles (OMs) are known as asymptomatic benign soft tissue lesions mostly seen in the oral cavity.
Their clinical characteristics include painless, soft, smooth, spherical, translucent, fluctuant single or multiple nodules with minimal irritation.
Although they may appear at any age, most OMs are widely seen in the second and third decade of life. Mucoceles have been classified as either extravasation type or retention type.
Extravasation type usually occurred when mucin from the ruptured salivary duct (s) is encapsulated in connective tissue around the gland.
Retention type is an actual cyst accumulated with mucin and lined by ductal epithelium.
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Mucocele formation is related to mucus extravasation from accessory salivary glands and usually has a traumatic origin, especially following lip biting.
The lower lip is the most common site of the mouth, however, a mucocele can be found in the tongue, floor of the mouth (ranula), and the buccal mucosa.
° Journal of Islamic Dental Association of IRAN (JIDAI) Autumn 2017 ;29, (4) / Gh. Ansari / S-H. Daneshvar