Simple and aneurysmal bone cyst: Aspects of jaw pseudocysts based on an experience of Brazilian pathology service during 53 years

Abstract

BackgroundJaw pseudocysts are benign osseous lesions of unclear etiology. Among these, the simple bone cyst (SBC) and aneurysmal bone cyst (ABC) are intriguing bone pathologies still rarely studied together. This retrospective study aimed to present the long-term case series of patients with jaw pseudocysts focusing on the clinical, radiographic, and transoperative aspects.Material and MethodsA retrospective case series of patients with SBC and ABC was performed. Clinical, radiographic, and transoperative aspects of both pseudocysts were reviewed from the histopathological archives of 20,469 cases between 1959-2012. All descriptive data were summarized.ResultsOf 354 (15.25%) bone pathologies, 54 cases of jaw pseudocysts were found, with 42 (11.86%) SBC and 12 (3.39%) ABC cases. For both lesions, most of the sample were young Caucasian women with an asymptomatic posterior mandible lesion with undetermined time of evolution and none trauma history. A unique radiolucent scalloped lesion presenting an empty cavity were also observed for both conditions. However, some atypical findings were found for SBC including: the expansion of bone cortical, tooth resorption, displacement of the mandibular canal, and recurrence. The absence of painful symptoms and the lack of classical blood-filled cavity were observed in some cases of ABC.ConclusionsThe SBC and ABC are bone pathologies with few retrospective studies, no previous studies on the two conditions, varied nomenclature, and atypical aspects in some cases. Therefore, the knowledge of clinical, imaging, and transoperative features of such pseudocysts are clinically valuable as diagnosis hypothesis of radiolucent lesions of the jaws. Key words:Simple bone cyst, aneurysmal bone cyst, pseudocysts, jaws.

Mandibular traumatic bone cyst: case report

“…The literature reports the highest incidence of TBC in the first and third decades of life and, although gender preference is still unclear, approximately 3 out of 5 cases occur in men. 6 In this case, the patient was 16 years old, which is in agreement with the age groups most affected by TBC. The cause of these lesions is still controversial, yet the trauma -hemorrhage theory has many supporters.…”

“…The cause of these lesions is still controversial, yet the trauma -hemorrhage theory has many supporters. 6 In the present case, the patient did not report any history of trauma to the face.…”

“…A large number of cases of intra -osseous lesions without symptomatology can be diagnosed based on the results of panoramic radiography, 6 particularly those that are requested for orthodontic treatment. In this case, the patient's lesion in the mandible was detected in a panoramic radiograph that had been requested for planning orthodontic therapy.…”

“…5 It frequently occurs in young male adults in the second decade of life and shows no predilection for ethnic groups. 6,7 Clinically, the lesion is asymptomatic. The absence of bone growth can be observed in approximately 92% of the patients, showing the potential of the lesion to develop in narrow spaces.…”

Cisto ósseo aneurismático associado a fibroma ossificante central – relato de caso

“…21 No nosso estudo, tanto o fibroma ossificante central como a lesão central de células gigantes predominaram.…”