[Mandibular mediastinal cyst. Report of a case with probable odontogenic origin].

The Authors report a case of an incidentally discovered mandibular cyst in a 40-year-old man. X-ray examination revealed an intramandibular symmetric radiolucency extending from the right II molar to the left II one; it was not connected to the root apices of residual teeth, but contained three sopranumerary tooth buds in incisive area. Histology showed a cyst lined-up by stratified squamous epithelium, with focal orthokeratinization. The clinico-radiographic and histologic findings were consistent with a median mandibular cyst, unusually large; the presence of medially located denticles inside the cyst strongly suggested an odontogenic origin.