NONODONTOGENIC CYSTS AND PSEUDOCYSTS OF THE JAWS: A CLINICOPATHOLOGIC ANALYSIS OF A CASE SERIES

Abstract

Objective The aim of this study was to evaluate the clinicopathologic features of a series of nonodontogenic cysts (NOC) and pseudocysts of the jaws. Study Design This is a retrospective, observational, and descriptive study. Between 2000 and 2017, all cases of NOC and pseudocysts of the jaws diagnosed in an oral pathology laboratory were selected for the study. Clinical and demographic data were recorded from the clinical charts. Subsequently, the slides stained with hematoxylin and eosin were reviewed to confirm the diagnosis. Results From the 6000 biopsies registered in the laboratory database, 27 (0.45%) were diagnosed as NOC and 11 (0.18%) as pseudocysts of the jaws. The most frequent NOC were epidermoid or dermoid cyst (40.7%), followed by lymphoepithelial (33.3%), and nasopalatine cyst (18.5%). Most cases occurred in females (66.1%) and in patients between the second and fifth decades of life. Simple bone cyst was the only pseudocyst diagnosed, with predominance in females (54.5%) during the second decade of life. Conclusion NOC are uncommon, with predominance of soft tissue cysts. The low prevalence of simple bone cysts in an oral pathology laboratory may be a consequence of their clinico-surgical feature, an empty bone cavity, resulting in scarce tissue for histopathologic analysis. The aim of this study was to evaluate the clinicopathologic features of a series of nonodontogenic cysts (NOC) and pseudocysts of the jaws. This is a retrospective, observational, and descriptive study. Between 2000 and 2017, all cases of NOC and pseudocysts of the jaws diagnosed in an oral pathology laboratory were selected for the study. Clinical and demographic data were recorded from the clinical charts. Subsequently, the slides stained with hematoxylin and eosin were reviewed to confirm the diagnosis. From the 6000 biopsies registered in the laboratory database, 27 (0.45%) were diagnosed as NOC and 11 (0.18%) as pseudocysts of the jaws. The most frequent NOC were epidermoid or dermoid cyst (40.7%), followed by lymphoepithelial (33.3%), and nasopalatine cyst (18.5%). Most cases occurred in females (66.1%) and in patients between the second and fifth decades of life. Simple bone cyst was the only pseudocyst diagnosed, with predominance in females (54.5%) during the second decade of life. NOC are uncommon, with predominance of soft tissue cysts. The low prevalence of simple bone cysts in an oral pathology laboratory may be a consequence of their clinico-surgical feature, an empty bone cavity, resulting in scarce tissue for histopathologic analysis.