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.
Highlights
A Simple Bone Cyst (SBC) is known as solitary cyst, traumatic bone cyst, hemorrhagic bone cyst, unicameral bone cyst, and idiopathic bone cavity
According to the latest WHO classification for head and neck tumours, in 2005, it has been included among related lesions affecting jawbones, along with fibrous dysplasia and the central giant cell granuloma (1)
A number of theories have been proposed relating its etiology and pathogenesis, such as a sequela of intraosseous hematoma, alterations in calcium metabolism, mild infectious conditions, local bone growth alteration, orthodontic treatment, venous obstruction, and a localized alteration of bone metabolism resulting in the development of an area of osteolysis (6)
Summary
A Simple Bone Cyst (SBC) is known as solitary cyst, traumatic bone cyst, hemorrhagic bone cyst, unicameral bone cyst, and idiopathic bone cavity. According to the latest WHO classification for head and neck tumours, in 2005, it has been included among related lesions affecting jawbones, along with fibrous dysplasia and the central giant cell granuloma (1) This is a rare pathology accounting for only 1% of tumours and cysts in the maxillofacial region; by definition, though, this is not a cyst since it does not have an epithelial lining. In surgical exploration it is very often described as an empty cavity, but it may hold a hematic and/or serous content (2). We present the unusual evolution of a SBC within 4 years of clinical and imaging follow-up
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