Aneurysmal Bone Cyst with Ossifying Fibroma of the Mandible: A Case Report and Review of the Literature

Aneurysmal Bone Cysts (ABCs) are uncommon benign bone lesions primarily affecting children and adolescents. They are distinguished by severe bone breakdown and expansive tissue growth, resulting in clinical symptoms and potential complications. ABCs typically occur in long bones, but reports have also documented their presence in the jaws, particularly the mandible. These lesions are commonly considered non-cancerous and are characterized by cystic or blood-filled chambers. There are two clinicopathological variations of ABC: primary ABC and secondary ABC. Primary ABC originates independently, while secondary ABC develops as a result of a pre-existing lesion such as a cyst, tumor, or Fibro-Osseous Lesions (FOL) like solitary bone cyst, ossifying fibroma, or giant cell granuloma. When ABC coexists with another bone lesion believed to be its precursor, it is referred to as an “ABC plus lesion”. In this case report, a 75-year-old patient, presented with a painful growth in the lower anterior region of the jaw for the past 18 months. The diagnosis was established through clinical, radiological, and histopathological examinations. A complete surgical resection was performed, followed by uneventful reconstruction. Histopathological examination confirmed the presence of ABC with ossifying fibroma (ABC plus lesion). It is important to address ABC plus lesions as they can cause significant pain, deformity, and discomfort. Although non-cancerous, they can still disrupt normal bone structure and function. This case report emphasizes the clinical, radiographic, and histopathological features of ABC plus lesions, aiding in disease identification