The unusual evolution of a simple bone cyst in the mandible: a case report

Abstract

The simple bone cyst, as newly classified by WHO in 2005, is a lesion related to the jawbones. Therefore, it is not a cyst, since it is a cavity devoid of epithelial tissue. It is a rare pathology affecting the mandible more than the maxilla. Its onset occurs mainly during the first two decades of life, irrespective of sex. The purpose of our report is to exhibit the particular case of a 17-year-old male patient whose radiography showed an osteolytic lesion in his right mandibular body. Exploratory surgery and biopsy are performed showing a simple bone cyst. Since then, he is controlled through imaging studies, but presenting an atypical evolution, with its size increasing considerably within a 4-year follow-up. Key words:Case report, simple bone cyst, hemorrhagic bone cyst, solitary bone cyst, idiophatic bone cyst, mandible.

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

“…By definition, a pseudocyst is a pathological cavity without lining epithelium and with clinical and radiographic similarities to true cysts, except for histopathological findings (1,2). Among the pseudocysts of maxillary bones, the Simple Bone Cyst (SBC), also known as Traumatic Bone Cyst, Hemorrhagic Bone Cyst, Solitary Bone Cyst, and Idiopathic Bone Cavity appears as a rare pathology (1,2).…”

“…Among the pseudocysts of maxillary bones, the Simple Bone Cyst (SBC), also known as Traumatic Bone Cyst, Hemorrhagic Bone Cyst, Solitary Bone Cyst, and Idiopathic Bone Cavity appears as a rare pathology (1,2). This entity accounts for only 1-2% of all pseudocysts/cysts in the maxillofacial region, and it is commonly found in the long bones (90%), humerus (65%), and femur (25%) (1,2). …”

“…However, this entity tends to have more aggressive clinical behavior than SBC (1-4). The etiology and pathogenesis of SBC are still uncertain and the literature suggests the presence of intraosseous hematoma caused by trauma, venous obstruction, disturbance of the local bone growth or changes in bone metabolism (2). These events may result in blood clot liquefaction and bone lysis (2).…”

“…The etiology and pathogenesis of SBC are still uncertain and the literature suggests the presence of intraosseous hematoma caused by trauma, venous obstruction, disturbance of the local bone growth or changes in bone metabolism (2). These events may result in blood clot liquefaction and bone lysis (2). The most accepted theory for ABC etiology is a probable previous trauma resulting in blood accumulation inside the bone tissue (3,4).…”

Cyst of traumatic origin

“…It shows no epithelial lining, which sets apart this lesion from the true cysts. 3 Barnes enlisted innumerable terms for traumatic bone cyst which was familiarized in literature as traumatic cyst, traumatic haemorhagic cyst, progressive bone cavity, solitary bone cavity, solitary bone cyst, simple bone cyst, idiopathic bone cavity, haemorhagic bone cyst, extravasation cysts, haemorhagic cyst, haemorhagic extravasation, solitary haemorhagic cyst. 4 This array of countless names is as a consequence of lack of clear understanding of its etiology and pathogenesis.…”