Multiple mucous retention cysts of the oral mucosa and lower lip: A rare entity

Multiple mucous retention cysts are relatively rare conditions, particularly on the lower lip. This case report presents a 60-year-old man with multiple swelling structures located in the right and left buccal mucosa, and lower labial mucosa. A biopsy was done, and a histologic assessment confirmed dilation of minor salivary ducts and cystic formation. Several factors may interfere with the creation of this uncommon phenomenon, such as alteration in salivary secretion, and congenital or acquired weakness in the ductal structure. In addition, it is suggested that ductal narrowing may be due to the long-term application of some mouthwash containing hydrogen peroxide, deodorant also anti-plaque, and tartar-control toothpaste.