Introduction
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History
15 yo, F
Asymptomatic patient
Gross Findings
The specimen consisted of an intact central tooth with a cyst-like tissue associated with the crown and half of the root of the tooth.
Microscopic Findings
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Final Diagnosis:
ADENOMATOID ODONTOGENIC TUMOUR
- < 5% of odontogenic tumours
- More than 95% of AOTs are intraosseous
- Invariably asymptomatic
- Bony expansion +/-
Treatment
- Enucleation
- Recurrence due to incomplete excision
Take-Home Messages
“Two-thirds” rule:
- Two-thirds occur in females
- Two-thirds occur in the maxilla
- Two-thirds are associated with an impacted tooth
- Two-thirds of the impacted teeth are canines
- Two-thirds of the radiographs show radiopaque flecks of calcifications
- Must be differentiated from solid ameloblastoma due to its significantly different biologic behavior and treatment
(Practical Head and Neck Pathology, Frequently Asked Questions, 2019)