This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'All are true about the nasolabial cyst, except - \nSelect and explain. \nA. Arises from odontoid epithelium, B. Presents submucosally in anterior nasal floor, C. Bilateral, D. Usually seen in adults', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Jaw cysts \n\nJaw cysts may be either :\n\n\nodontogenic :- Derived from remnants of odontoid epithelium\nNon-odontogenic :- Not derived fun odontoid epithelium\nPseudocyst\n\nNasolabial cyst \n\nNasolabial cyst is a rare nonodontogenic developmental cyst.\nIt is believed to be derived from remnants of the nasolacrimal duct.\nSeen most often in adults in the 4th to 6th decades of life.\nIt has a strong female predilection. 3:1 female-to-male ratio\nIt is usually unilateral. Bilateral in 10% cases.\nThis lesson presents an extraosseous location in the region of the nasolabial fold and can cause swelling in the furrow, alar nose elevation and upper lip projection. The clinical findings of the nasolabial cyst are fairly typical. Patients usually complain of a swelling adjacent to the nose, and sometimes the cyst may be observed on routine examination. The development of swelling in the maxillary buccal sulcus may reach great dimensions, causing discomfort with the use of dentures, breathing obstruction and facial asymmetry.\nIt is generally painless unless secondarily infected.\nThe nasolabial cyst is lined by pseudostratified columnar epithelium.\nTreatment- Transoral surgical excision.', 'role': 'assistant'}]