Mucocele
Pronunciation: MYOO-koh-seel
A benign pooling of mucin in the soft tissue, resulting from rupture of a minor salivary gland duct, typically presenting as a fluctuant swelling on the lower lip.
Full Definition
A mucocele is a benign, mucin-filled lesion of the oral soft tissues arising from mechanical trauma or obstruction of a minor salivary gland duct, leading to extravasation or retention of mucus. The extravasation type (most common) results from duct rupture and mucin spillage into surrounding connective tissue, provoking a granulomatous response. The retention type, caused by duct obstruction, is less common and lined by ductal epithelium. Clinically, mucoceles appear as dome-shaped, translucent, fluctuant swellings most frequently on the lower labial mucosa. Editors should distinguish 'mucocele' from 'ranula,' a specific form occurring on the floor of the mouth and arising from the sublingual gland.
Usage
Usage note: Use 'ranula' specifically for mucoceles of the floor of the mouth. 'Mucous cyst' is an informal synonym to be avoided in formal clinical or pathology documents.
In Context
- "The patient presented with a recurrent mucocele on the lower lip following repeated biting trauma." — Clinical case report
- "The author referred to the floor-of-mouth lesion as a 'mucocele'; the editor recommended 'ranula' as the anatomically specific and preferred term." — Copy-editing note