[1] Structurally, the cyst is lined by thin epithelium and shows a lumen usually filled with desquamated keratin, occasionally containing inflammatory cells.They are formed from fragments of dental lamina that remains within the alveolar ridge mucosa during tooth formation (odontogenesis).Specifically, they emerge when the process of formation extends into the abnormal sites to form small keratinized cysts.[2] They are generally harmless (asymptomatic) and do not cause discomfort, and they normally degenerate and involutes or rupture into the oral cavity within 2 weeks to 5 months after birth.They are found at the junction of the hard and soft palate, and along lingual and buccal parts of the dental ridges, away from the midline.It usually occurs on the facial gingiva as a single small flesh colored swelling, sometimes with a bluish hue due to the cystic fluid.
Gingival cyst of adult (arrow)
Panoramal radiograph of GCA. Inset: no evidence of bone involvement.