Jaw cysts and lesions
Use history, vitality, imaging and histology to distinguish common cysts and other radiolucencies. Plan follow-up against the diagnosis.
Understand
Radiolucencies and radiopacities include developmental, inflammatory, odontogenic and non-odontogenic causes. Site, border, tooth relation and growth pattern narrow the differential.
Assess
Check symptoms, vitality of adjacent teeth, previous images, cortical expansion, root effects and systemic findings. Consider cross-sectional imaging if it changes surgical planning.
Apply
Plan biopsy, enucleation, decompression or observation according to the likely diagnosis and risk. Histology and follow-up are essential for lesions with recurrence potential.
Key distinctions
Jaw lesions should be described before named: location, border, internal density, relation to teeth, cortical change and effect on roots or canal. A periapical inflammatory lesion typically needs a non-vital or diseased associated tooth, though tests can be imperfect. Expansion, paraesthesia or aggressive radiographic features broaden the differential and urgency. Histology and recurrence risk shape follow-up.
Think through a case
A well-defined jaw radiolucency around a non-vital tooth suggests an inflammatory lesion, but expansion or atypical features require a broader differential.
The distinction to remember
Do not name a cyst type definitively from radiographic shape alone. Histology and follow-up may change management.
Test your recall
Can a radiograph alone confirm a cyst type?
Show answer
No; histopathology may be needed.