title: Odontogenic keratocyst mimicking paradental cyst.
abstract: Objective. The aim of this paper is to present an uncommon clinical and radiographic aspect of odontogenic keratocyst (OKC) mimicking paradental cyst. Methods. A 32-year-old female patient showed a well-delimited radiolucent lesion connected with the root of the left third molar with close anatomical relationship with the mandibular canal. The clinical, radiographic, and anamnestic features lead us to diagnose a paradental cyst that was treated by enucleation after extraction of the partially impacted tooth. Results. Histological analysis showed typical histological features of PKC such as the presence of a lining of stratified squamous epithelium with a well-defined basal layer of palisading columnar of cuboidal cells. Conclusion. Initial X-ray analysis and the position of the lesion related to the third mandibular tooth caused us to mistakenly diagnose a paradental cyst. We were only able to identify the cyst as an PKC rather than a paradental cyst after histological analysis.
authors.affiliation: Department of Oral Surgery, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Via Commenda 10, 20122 Milan, Italy.
authors.forename: Andrea Enrico
authors.initials: AE
authors.lastname: Borgonovo
authors.affiliation: Department of Oral Rehabilitation, Istituto Stomatologico Italiano, University of Milan, Via Pace 21, 20122 Milan, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Bernardini
authors.affiliation: Department of Oral Rehabilitation, Istituto Stomatologico Italiano, University of Milan, Via Pace 21, 20122 Milan, Italy.
authors.forename: Paola
authors.initials: P
authors.lastname: Francinetti
authors.affiliation: Department of Oral Rehabilitation, Istituto Stomatologico Italiano, University of Milan, Via Pace 21, 20122 Milan, Italy.
authors.forename: Federica
authors.identifier: 0000-0002-8507-2585
authors.initials: F
authors.lastname: Rizza
authors.affiliation: Department of Oral Rehabilitation, Istituto Stomatologico Italiano, University of Milan, Via Pace 21, 20122 Milan, Italy.
authors.forename: Dino
authors.identifier: 0000-0001-8642-5007
authors.initials: D
authors.lastname: Re
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