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Traumatic bone cyst
Amin Abusallamah
Definition
• A traumatic bone cyst is an empty intrabony cavity that lacks an epithelial lining.
• The designation of pseudocyst relates to the cystic radiographic appearance and gross surgical presentation of this lesion It is seen mostly in the mandible.
Etiology and Pathogenesis
• The pathogenesis is not known, in some cases seem to be associated with antecedent trauma.
• It has been hypothesized that a traumatically induced hematoma forms within the intramedullary portion of bone.
• Rather than organizing, the clot breaks down, leaving an empty bony cavity.
• Alternative developmental pathways include cystic degeneration of primary tumors of bone, such as central giant cell granuloma, disorders of calcium metabolism, and ischemic necrosis of bone marrow.
Clinical Features
• Teenagers are most commonly affected
• The most common site of occurrence is the mandible
• Swelling is occasionally seen
• pain is infrequently noted.
Radiograph finding
Radiolucent area with scalloping borders between the roots of the teeth
Radiographically, a well-delineated area of
Diagnosis
• Have no epithelial lining . Appear empty at operation or contains pale fluid .
• Diagnosis suggested by radiographic features (especially extension between tooth roots)
Histopathology
• Grossly, only minimal amounts of fibrous tissue from the bony wall are seen. The lesion may occasionally contain blood or serous fluid.
• Microscopically: delicate, wellvascularized, ibrous connective tissue without evidence of anepithelial component is identified
• Chapter … 10… pages … 341