Benign Tumors of the Jaws

Question 1

Torus Palatinus

Answer 1

Bony protuberance (hyperostosis)

Middle third of midline of hard palate

20% of pop greater in women

Well defined and radiopaque

20s to 30s

Question 2

Torus Mandibularis

Answer 2

Usually women, lingual to premolars

Develops in older patients

Question 3

Enostosis - Idiopathic Osteosclerosis

Answer 3

Localized growths of compact bone extending from endosteal surface of cortical bone into cancellous bone in mandibular premolar-molar region

Question 4

Enostosis - Idiopathic Osteosclerosis Radiographic Features

Answer 4

Isolated areas of radiopacities. May grow periapically as dense homogeneous bones.

Vital tooth, self limiting

Question 5

Odontogenic Keratocystic Tumor (OKC)

Answer 5

From cells of dental lamina

Epithelium is keratinized w/ inherent growth

Cyst contains a cheesy material

Question 6

OKC Clinical Features

Answer 6

2nd-3rd decade

More in males

More in posterior mandible

No symptoms typically w/ high propensity for recurrence

Question 7

OKC Radio Features

Answer 7

Usually post body of mandible

May surround crown of unerupted tooth (may look like dentigerous cyst)

Well defined and corticated, may have scalloping

Unilocular or multilocular radiolucency

Question 8

OKC Radio features continued

Answer 8

Usually grow antero-posteriorly w/ minimal expansion (body of mandible)

Upper ramus = lots of expansion

Can displace and resorb roots

Question 9

Basal Cell Nevus Syndrome (NBCCS)

Answer 9

Gorlin-Goltz syndrome

Young in life

Mutation in Patched gene (chromsome 9q)

Multiple OKCs

Calcification of Falx cerebri

Question 10

Ameloblastoma

Answer 10

More in men 20-50 years

Posterior mandible

Question 11

Ameloblastoma Radio Features

Answer 11

Molar/ramus region

Well defined, corticated

Unilocular/multilocular

Extensive root resorption!!!

Expand and displace

Question 12

Recurrent Ameloblastoma

Answer 12

Multilocular with very coarse sclerotic cortical margins

Question 13

Adenamatoid Odontogenic Tumor (AOT)

Answer 13

More in females
5-50 years
Slow growing swelling

Question 14

AOT Radiographic Features

Answer 14

Usually seen anterior maxilla esp canines! (Looks like dentigerous cysts sometimes)

Well defined borders

Radiopacities/calcifications!!! in 75%, 25% radiolucent

D, E, RR

Question 15

Calcifying Epithelial Odontogenic Tumor (CEOT)

Answer 15

Looks like AOT but calcification is right on crown
Pindborg tumor
More in men
Jaw expansion

Question 16

CEOT

Answer 16

More in mandible - premolar/molar

Well-defined/diffuse borders

Radiolucent w/ radiopacties close to teeth

D, E, RR

Question 17

Odontoma

Answer 17

Most common odontogenic tumor

2nd decade

May interfere w/ eruption of permanent teeth

Compound (lots of small teeth) or Complex (mass of tooth like densities)

Question 18

Ameloblastic Fibroma/Fibro-dontoma

Answer 18

5-20 years

Associated with missing teeth

D

Question 19

Ameloblastic Fibroma/Fibro-dontoma Radio Features

Answer 19

Premolar-molar region of mandible

Well-defined, corticated

Unilocular/multilocular

Associated teeth may not erupt or pushed apically

Question 20

Odontogenic Myxoma

Answer 20

Looks and behaves like amelloblastoma

More in females 10-30

Associated w/ missing teeth

High recurrence

Question 21

Odontogenic Myxoma Radio features

Answer 21

Multilocular

Has very straight septations in multilocular borders

Question 22

Benign Cementoblastoma

Answer 22

More in males

Slow growing, eventually displace teeth

Tooth may be painful

Question 23

Benign Cementoblastoma Radio features

Answer 23

Mand premolar-molar teeth

Well-defined radiopacity around root w/ radiolucent halo

May resorb roots