Lateral periodontal cyst: a rare clinicopathological presentation mimicking a residual cyst

• Davi-da Silva Barbirato ^[1] ; Mariana-Fampa Fogacci ^[2] ; Monique-Oliveira Rodrigues ^[3] ; Belmiro-Cavalcanti-do Egito Vasconcelos ^[1] ; Maria-Cynésia-Medeiros de Barros ^[3] ; Fábio-Ramôa Pires ^[4]
  1. [1] Universidade de Pernambuco

     Universidade de Pernambuco

     Brasil

     
  2. [2] Universidade Federal de Pernambuco

     Universidade Federal de Pernambuco

     Brasil

     
  3. [3] Universidade Federal do Rio de Janeiro

     Universidade Federal do Rio de Janeiro

     Brasil

     
  4. [4] DDS, PhD. Professor, Department of Oral Pathology, Laboratory of Oral Pathology, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro, Brazil

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• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 14, Nº. 1 (January), 2022, págs. 95-99
• Idioma: inglés
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• Resumen

  • This article describes an unusual clinical-radiographic presentation of a lateral periodontal cyst, as a differential diag- nosis of a residual cyst, following the ‘CARE guidelines for case reports’. The radiolucent lesion was identified on the imaging exam of a 53-year-old male patient. Based on radiographic findings and aspiration puncture, the probable diagnosis was a residual cyst; however, histological analysis revealed a thin, non-inflamed fibrous capsule covered by some epithelial layers in most of the lesion. The definitive diagnosis was a lateral periodontal cyst with unusual clini- cal and radiographic features. The cyst was surgically enucleated and local bone neoformation was observed, with no signs of recurrence after 12 months. The results of this study suggest that a radiolucent lesion, suggestive of a residual cyst or keratocyst in the maxilla, may correspond to a lateral periodontal cyst. In this context, the histopathological analysis of the cyst is essential for the definitive diagnosis.