These cysts of the mouth and oral cavity are less common than odontogenic cysts.
CHARACTERIZATION NASOPALATINE DUCT CYST AKA incisive canal cyst, NPDC
Derived from persistent embryonic duct that extends from the median ostium or two paramedian ostia in the region of a midline palatal gingival papilla (incisive papilla) and extends superiorly throught the anterior maxilla to ostia in floor of the nose
75% occur in women
2.0 cm extraosseous cyst anterior to nasal floor/inferior nasal turbinate with protrusion of the upper lip, anterosuperior displacement of nasal ala, and fullness of the mucobuccal fold
HISTOLOGICAL TYPES CHARACTERIZATION NASOPALATINE DUCT CYST Thin cuboidal, respiratory, or stratified squamous epithelium, or in combination NASOLABIAL CYST Lining of respiratory epithelium, occasionally squmaous or cuboidal
PROGNOSIS AND TREATMENT CHARACTERIZATION PROGNOSTIC FACTORS NPDC may recure following enucleation
Rosai J. Ackerman's Surgical Pathology. Eight Edition. Mosby 1996.
Sternberg S. Diagnostic Surgical Pathology. Third Edition. Lipincott Williams and Wilkins 1999.
Mouth and Oral Cavity
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