Odontogenic tumours

Question 1

Odontogenic tumours - classification

Answer 1

epthelial
mesenchymal
mixed

Question 2

odontogenic sources of epithelium

Answer 2

rests of Malassez
- remnants of henrtwigs epithelial root sheath
rests of Serres
- remnants of the dental lamina
reduced enamel epithelium
- remnants of the enamel organ

Question 3

examples of epithelial odontogenic tumours

Answer 3

ameloblastoma
adenomatoid odontogenic tumour
calcifying epithelial odontogenic tumour

Question 4

give and example of a mesenchymal odontogenic tumour

Answer 4

odontogenic myxoma

Question 5

give an example of a mixed odontogenic tumour

Answer 5

odontoma

Question 6

50% of odontogenic tumours are..

Answer 6

either ameloblastoma or odontoma

Question 7

Ameloblastoma features

Answer 7

benign epithelial tumour
locally destructive but slow growing
typically painless

Question 8

ameloblastoma incidence

Answer 8

1% oral and maxillofacial tumour
most common 4th-6th decades
80% in posterior mandible
M>F

Question 9

Ameloblastoma types - radiological

Answer 9

multicystic
- 85-90%
unicystic
- younger patients
- lower risk of recurrence

Question 10

ameloblastoma types - histological

Answer 10

follicular
plexiform
desmoplastic

Question 11

Ameloblastoma radiological features

Answer 11

well defined corticated margins
potentially scalloped
multi cystic type may have thick, curved septa

affect on adjacent structures
- displacement
- knife edge external root resorption
- thinning of bony cortices

Question 12

follicular ameloblastoma - histology

Answer 12

ameloblast-like cells
stellate reticulum like tissue
cystic changes
fibrous tissue

Question 13

ameloblastoma - management

Answer 13

surgical resection with margin