title: Mixed periapical lesion: an atypical radicular cyst with extensive calcifications.
abstract: The radicular cyst is an inflammatory odontogenic cyst of endodontic origin. Radiographically, the lesion appears as a periapical radiolucent image. This report describes a very rare case of a mixed periapical radiographic image diagnosed as a radicular cyst. A 37-year-old female patient presented a mixed, well-circumscribed image located in the periapical region of the left maxillary central incisor, which presented unsatisfactory endodontic treatment. Microscopic examination revealed a cavity lined by non-keratinized squamous epithelium and extensive calcifications in the cystic lumen and lining epithelium. Diagnosis of radicular cyst with extensive calcifications was established. Endodontic retreatment was performed and no radiographic signs of recurrence were observed 18 months after treatment. Although very rare, a radicular cyst should be considered in the differential diagnosis of a mixed periapical image associated to teeth with pulp necrosis.
authors.affiliation: Department of Clinical and Preventive Dentistry, School of Dentistry, UFPE - Federal University of Pernambuco, Recife, PE, Brazil.
authors.forename: Flávia Maria de Moraes
authors.initials: FM
authors.lastname: Ramos-Perez
authors.affiliation: Department of Clinical and Preventive Dentistry, School of Dentistry, UFPE - Federal University of Pernambuco, Recife, PE, Brazil.
authors.forename: Andréa dos Anjos
authors.initials: Ados A
authors.lastname: Pontual
authors.affiliation: Department of Clinical and Preventive Dentistry, School of Dentistry, UFPE - Federal University of Pernambuco, Recife, PE, Brazil.
authors.forename: Talita Ribeiro Tenório de
authors.initials: TR
authors.lastname: França
authors.affiliation: Department of Clinical and Preventive Dentistry, School of Dentistry, UFPE - Federal University of Pernambuco, Recife, PE, Brazil.
authors.forename: Maria Luiza dos Anjos
authors.initials: ML
authors.lastname: Pontual
authors.affiliation: Oral Radiology Section, UFPB - Federal University of Paraiba, João Pessoa, PB, Brazil.
authors.forename: Ricardo Villar
authors.initials: RV
authors.lastname: Beltrão
authors.affiliation: Department of Clinical and Preventive Dentistry, School of Dentistry, UFPE - Federal University of Pernambuco, Recife, PE, Brazil.
authors.forename: Danyel Elias da Cruz
authors.initials: DE
authors.lastname: Perez
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D054893:Cone-Beam Computed Tomography / Q000379:methods; D003937:Diagnosis, Differential; D005260:Female; D018214:Fibroma, Ossifying / Q000175:diagnosis; D005500:Follow-Up Studies; D006801:Humans; D008439:Maxillary Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008441:Maxillary Neoplasms / Q000175:diagnosis; D009808:Odontogenic Tumors / Q000175:diagnosis; D011842:Radicular Cyst / Q000175:diagnosis* / Q000000981:diagnostic imaging; D016300:Radiography, Bitewing; D019553:Tooth, Nonvital / Q000000981:diagnostic imaging