Odontogenic Tumors

Question 1

Ameloblastoma
Adenomatoid Odontogenic Tumor
Calcifying Epithelial Odontogenic Tumor
Squamous Odontogenic Tumor
Clear cell odontogenic tumor

These are all

Answer 1

Tumors of odontogenic epithelium

Question 2

The most common odontogenic tummor: 20-60 yrs. no sex predilection

Mandible > Maxilla
Posterior > Anterior

Often associated with impacted 3rd molar
Resorption of adjacent tooth roots common

Multilocular/unilocular radiolucent lesion

“SOAP BUBBLE or Honeycomed appearance”

Reverse polarization seen in histology

Answer 2

Conventional Ameloblastoma

Question 3

Younger patients: 10-20 yrs

Mandible > Maxilla
Posterior > Anterior

Small lesions - asymptomatic
Large lesions - painless expansion

Often associated with the crown of unerupted third molar

Well defined unilocular radiolucency

Answer 3

Unicystic Ameloblastoma

Question 4

Uncommon

Wide rage, mostly middle aged

Mandible > Maxilla

Clinically presents as a nodule on the posterior gingiva or alevolar mucosa

Answer 4

Peripheral Ameloblastoma

Question 5

Any age

Metastases to the lung, cervical lymph node

poor prognosis

Answer 5

Malignant ameloblastoma

Question 6

Any age, more in older group

Metastases do not necessarily occur

Cytological features of malignancy

Answer 6

Ameloblastic carcinoma

Question 7

3-7% of all odontogenic tumors

Young patients between 10-19 years

Anterior maxilla
Females>males

often involves the crown of an unerupted canine

unilocular radiolucency, may show snowflake calcifications

Answer 7

Adenomatoid odontogenic tumor (AOT)

Question 8

Uncommon

wide age range (mostly 30-50 yrs)

mandible posterior

unilocular/multilocular radiolucency, may contain calcified structures

frequently associated with an impacted tooth

Answer 8

Calcifying epithelial odontogenic tumor (CEOT)

Question 9

Very rare
wide age range
maxilla = mandible
females = males

Asymptomatic or clinically presents as a gingival nodule with tooth mobility

Triangular radiolucent defect lateral to roots

Answer 9

Squamous odontogenic Tumor (SOT)

Question 10

Rare neoplasm
wide age range: most patients are older than 50 yrs

Mandible > Maxilla

Irregular unilocular or multilocular radiolucency

Neoplastic cells have “clear” morphology which resemble glycogen-rich presecretory ameloblasts

Answer 10

Clear Cell Odontogenic Tumor

Question 11

Ameloblastic fibroma
Ameloblastic fibro-odontoma
Odontoma
Dentinogenic ghost cell tumor

These are all?

Answer 11

Mixed odontogenic tumors

Question 12

uncommon neoplasm

younger patiens < 20 yrs
Males > females

Asymptomatic swelling of the jaws usually in posterior mandible

Well definied unilocular or multilocular radiolucency

Often associated with an uneruped tooth

Answer 12

Ameloblastic fibroma

Question 13

Rare

Features of ameloblastic fibroma with additional enamel and dentin formation
Children, average age 10 yrs

Predilection for posterior mandible

swelling of the jaws

radiolucent lesion with calcified material within the lesion

Answer 13

Ameloblastic Fibro-Odontoma

Question 14

Most common odontogenic tumor

composed of enamel and dentin and varying amounts of odontogenic epithelium and mesenchyme

Most patients are younger than 20

Asymptomatic/rarely expansion of jaws

Mixed lucent - opaque lesion

Answer 14

Odontoma

Question 15

Composed of multiple small tooth like structures located in the anterior maxilla

Answer 15

Compound odontoma

Question 16

Consists of a conglomerate mass of enamel and dentin located in the posterior jaw

Answer 16

Complex odontoma

Question 17

Very rare
Central islands of odontogenic epithelium containing ghost cells

Dentinoid deposition
Calcifications

Answer 17

Dentinogenic Ghost Cell Tumor

Question 18

Odontogenic Fibroma
Odontogenic Myxoma
Cementoblastoma

These are all?

Answer 18

Tumors mainly of odontogenic ectomesenchyme

Question 19

Uncommon, wide age range, Female>Male

Can be associated with unerupted teeth
presents anywhere in the jaws

Unilocular or multilocular radiolucency

Root divergence/root resorption possible

Answer 19

Odontogenic Fibroma

Question 20

Rare
Wide age range, mostly young adults
Mandible >Maxilla, any area of the jaw

Unilocular or multilocular radiolucnecy

Can cause resorption/displacement of teeth

Answer 20

Odontogenic Myxoma

Question 21

Rare
children and young adults

Usually seen in mandibular posterior region

Cortical expansion, cortical erosion, displacement of adjacent teeth

Radiopaque mass fused to tooth roots and surrounded by a radiolucent rim

Answer 21

Cementoblastoma