<prompt> All are true about nasolabial cysts exceptThey are BilateralPresent in adultsStrong female predilectionDerived from odontogenic epithelium  <response>: Nasolabial CystsNasoalveolar CystKlestadt;s Cyst:- It is a rare non odontogenic cyst which originates from epithelial entrapment in the line of fusion between maxillary and median nasal elevation. Female Male Bilateral in approximately 10 of all cases. Usually present in 4th and 5th decades of life. It lies on the bone and causes an excavation. It is closely attached t o floor of the nose. It presents as a smooth and soft bulge in the lateral wall and floor of vestibule anterior to inferior turbinate. Large cyst obliterates the alar facial fold nasolabial sulcus. Treatment:- It is by surgical excision using sublabial approach. Ref:- Scott Brown 7thed; pg num:- 1320 