Nasolabial cyst: diagnosis mainly based on topography?

The nasolabial cyst is described in three patients and literature is shortly reviewed. The condition manifests itself by a smooth, fluctuating swelling in the nasolabial fold next to the ala of the nose. This clinical manifestation represents the most important criterion for diagnosis. Histopathology and cytologic findings are of minor importance for diagnostic purposes. Etiology is still uncertain. According to the most accepted theory the lesion has to be classified among the fissural cysts, but histopathologic findings may vary and do not give support to any of the theories of etiology. Computertomography is better than conventional roentgenography to demonstrate the extension of the lesion into surrounding structures. Echography can give important preoperative information. Nomenclature related to this cystic lesion is not uniform. Nasolabial cyst is the most adequate term, as it is describing the lesion only topographically and is not referring to controversial etiologic theories or to variable histopathology. Therapy consists of surgical removal using an intraoral approach and prognosis is excellent.