Odontogenic tumours

Question 1

Most common benign epithelial odontogenic tumour?

Answer 1

Ameloblastoma

Question 2

Clinical features of an ameloblastoma?

Answer 2

Painless
Slow-growing
4th -6th decades
M>F
disaplacement of teeth
Extends in every direciton fairly equally

Question 3

Histology of ameloblastoma?

Answer 3

Ameloblast-like cells - columnar cells with darkly stained nuclei - arranged in island or strands
Loose stellate reticulum

Question 4

Radiological signs ameloblastoma?

Answer 4

Multicystic - 85-90% - soap bubble
Well-defined corticated margins
Primarily radiolucent
May cause external root resorption of other teeth

Question 5

Management of ameloblastoma?

Answer 5

Surgical resection
15% recurrence rate

Question 6

What are the common radiological features of Adenomatoid odontogenic tumour (AOT)?

Answer 6

Unilocular radiolucency
Internal calcifications
Well-defined corticated margins

Question 7

Common presentation of AOT?

Answer 7

75% associated with an unerupted tooth
Commonly associated with a maxillary canine
Similar to dentigerous cyst but typically attached apical to CEJ
May displace adjacent structures