Incidence age <30; no sex predilection Location mandible, femur, pelvic bones, radius, and tibia Clinical Features Tooth mobility, proptosis, concurrent infection, and dysesthesia are reported infrequently. If the lesion erodes through the cortex, then an accompanying soft tissue mass will be present. When this occurs, it may be difficult to determine whether the lesion is […]
Desmoplastic Fibroma Read Post »
AKA Cemetifying Fibroma, Cemento-Ossifying Fibroma Incidence rare; 3rd and 4th decade but can occur across a wide age range, female > male Clinical Presentation a true neoplasm (osteogenic neoplasm) with a significant growth potential. Composed of fibrous tissue that contains variable mixture of bony trabeculae and/or cementum-like spherules. Painless swelling causing obvious facial asymmetry. Rarely
Focal vs Periapical vs Florid Most common fibro-osseous lesion Arise in close approximation with PDL ang have histopathologic similarities with the structure Histopathology: fragments of cellular mesenchymal tissue composed of spindle-shaped fibroblasts and collagen fibers with numerous small blood vessels Treatment: regular recall exam; unless symptomatic due to chronic osteomyelitis involving dysplastic bone and cementum,
Cemento-Osseous Dysplasia Read Post »
Fibrous dysplasia is a developmental tumorlike condition that is characterized by replacement of normal bone by an excessive proliferation of cellular fibrous connective tissue intermixed with irregular bony trabeculae. Cause Sporadic condition that results from a postzygotic mutation in the GNAS1 (guanine nucleotide-binding protein, α-stimulating activity polypeptide 1) gene. Constitutive activation of G protein signaling
Cause Intraosseous accumulation of variable-sized, blood filled spaces surrounded by cellular fibrous connective tissue and reactive bone. Theorized that traumatic event, vascular malformation, or neoplasm may disrupt normal osseous hemodynamics and leads to an enlarging, hemorrhagic extravasation. Incidence Gnathic lesions mainly affect young patients (mean age 20 years). No sex predilection Location Aneurysmal bone cysts
Aneurysmal Bone Cyst Read Post »
AKA Traumatic bone cyst, hemorrhagic bone cyst, solitary bone cyst, idiopathic bone cyst Incidence Age 10 to 20 years old. Rare in children younger than 5 years and is seldom seen in patients older than 35. 60% in males Cause Trauma results in intraosseous hemorrhage which does not undergo organization and repair and liquefies, resulting
Central giant cell tumors of the jaws are benign but aggressively destructive osteolytic lesions. These tumors represent benign tumors of osteoclastic origin. The tumor is not a true granuloma (not a cyst). AKA Giant Cell Lesion, Giant Cell Tumor, formerly designated Giant Cell Reparative Granuloma (not a reparative response) Cause Multifocal giant cell lesions of
Central Giant Cell Granuloma Read Post »
AKA Dense bone island, bone eburnation, bone whorl, bone scar, enostosis, focal periapical osteopetrosis Cause Focal area of increased radiodensity that is of unknown cause and cannot be attributed to any inflammatory, dysplastic, neoplastic, or systemic disorders Incidence Increased frequency in blacks and Asians. No sex predilection. Most arise in late first or early second
Idiopathic Osteosclerosis Read Post »
Cause Area of hematopoietic marrow that produces area of radiolucency. Can be a result of aberrant bone regeneration after tooth extraction, persistent fetal marrow, marrow hyperplasia in response to increased demand for erythrocytes. Incidence 75% are adult women Location 70% occur in posterior mandible, most often in edentulous areas Clinical Features Typically asymptomatic and found
Focal Osteoporotic Marrow Defect Read Post »
Incidence Children and young adults Clinical Presentation Blue dome shaped, fluctuant swelling in the floor of the mouth. Located lateral to the midline (dermoid cyst are midline) Arises from superficial ducts of Rivini of sublingual gland. Location FOM, lateral to midline Plunging Ranula Spilled mucin dissects through the mylohyoid muscle and produces a swelling in
