Traumatic Bone Cyst
An empty or fluid-filled intraosseous cavity of the jaw lacking an epithelial lining, thought to arise from intramedullary haemorrhage following trauma, and classified as a pseudocyst.
Full Definition
Traumatic Bone Cyst, also referred to as simple bone cyst or solitary bone cyst in the jaw, is a pseudocyst because it lacks a true epithelial cyst lining. It most commonly occurs in the mandible of young patients, presenting as a scalloped radiolucency that appears to 'reach up between roots' on radiograph. The aetiology remains debated but is linked to failed healing after intramedullary haemorrhage. Surgical exploration reveals an empty or serosanguineous-fluid-filled cavity. Editors must note that 'traumatic' does not always imply a documented injury, and the term is retained for convention despite uncertain aetiology. This must not be confused with aneurysmal bone cyst, which has a distinct vascular histology.
Usage
Usage note: The term 'traumatic' is conventional rather than aetiologically precise; editors should not alter it unless house style specifically mandates 'simple bone cyst.' Always clarify 'pseudocyst' status when describing the absence of an epithelial lining.
In Context
- "Exploration of the mandibular lesion revealed an empty cavity with no epithelial lining, confirming the diagnosis of traumatic bone cyst." — Surgical Pathology Report
- "The editor ensured the text distinguished traumatic bone cyst from aneurysmal bone cyst by retaining the paragraph describing the absence of cystic lining." — Oral Pathology Textbook Chapter