Chapter 15 lecture 3

Question 1

Where do ameloblastomas infiltrate between?

Answer 1

• Cancellous bone

- Lesion periphery

Question 2

What is the most widely used treatment to remove an ameloblastoma?

Answer 2

-Marginal resection

Question 3

How far beyond the margins do surgeons take out an ameloblastoma?

Answer 3

-1.5 cm

Question 4

What does a peripheral ameloblastoma look like?

Answer 4

• Painless
• Nonulcerated
• Sessile gingival lesion

Question 5

Where are peripheral ameloblastomas most commonly found and are they more on the maxilla or mandible?

Answer 5

-Posterior gingival mucosa on the mandible

Question 6

What is the recurrence of a peripheral ameloblastoma?

Answer 6

15% the first time almost 0% the second time

Question 7

Malignant ameloblastomas shows metastatic deposits where most commonly?

Answer 7

-Lung

Question 8

T/F A malignant ameloblastoma is not cancerous

Answer 8

True

Question 9

T/F An ameloblastic carcinoma is not cancerous

Answer 9

False

-It is cancerous

Question 10

When do ameloblastic carcinomas develop?

Answer 10

-Later in life than conventional ameloblastomas and malignant ameloblastomas

Question 11

A malignant ameloblastoma has histologic features that look similar to what?

Answer 11

-Conventional ameloblastoma

Question 12

What age does an adenomatoid odontogenic tumor occur in?

Answer 12

-10-20

Question 13

What gender and area do adenomatoid odontogenic tumors most commonly occur?

Answer 13

• Anterior maxilla

- Females

Question 14

Adenomatoid odonteginc tumors are asymptomatic and discovered during and XRAY to determine why a tooth hasn’t erupted, what tooth is most often involved?

Answer 14

-Canine

Question 15

In 75% of adenomatoid odonteogenic tumors the tumor is what?

Answer 15

-Circumscribed, unilocular radiolucency involving the crown of an unerupted tooth

Question 16

What helps determine and adenmatoid odontgenic tumor from a dentigerous cyst?

Answer 16

• Radiolucency often extends apically past the CEJ

- Snowflake calcifications

Question 17

What might the lesions look like in an XRAY for and adenomatoid odontgenic tumor?

Answer 17

-Snowflake calcifications

Question 18

T/F Adenomatoid odontogenic tumors are malignant

Answer 18

False

-They are completely benign

Question 19

What is a calcifying epithelial odontogenic tumor aka?

Answer 19

-Pindborg Tumor

Question 20

Where do calcifying epithelial odontogenic tumors most often occur?

Answer 20

-Posterior mandible

Question 21

What is the most common presenting sign of a calcifying epithelial odontogenic tumor?

Answer 21

• Painless

- Slow growing swelling

Question 22

What does “driven snow” pattern deal with?

Answer 22

-Calcifying epithelial odontogenic tumor

Question 23

What impacted tooth is a calcifying epithelial odontogenic tumor most often associated with?

Answer 23

-Mandibular molar

Question 24

What are the calcifications with concentric rings formed in the amyloid like areas in a calcifying epithelial odontogenic tumor known as?

Answer 24

-Liesegang rings

Question 25

What is the stain they use to exhibit and apple-green birefringence in a calcifying epithelial odontogenic tumor?

Answer 25

-Congo Red

Question 26

What is an ameloblastic fibroma?

Answer 26

-True mixed tumor that has both epithelial and mesenchymal tissues that are neoplastic

Question 27

What age to ameloblastic fibromas usually occur?

Answer 27

-Before age 20

Question 28

Where are most ameloblastic fibromas located?

Answer 28

-Posterior mandible most commonly with an unerupted tooth

Question 29

What does the histology of an ameloblastic fibro-odontoma appear similar to?

Answer 29

-Ameloblastic fibroma except the ameloblastic fibro-odontoma has enamel and dentin

Question 30

What are the four differentials that have calcifications?

Answer 30

- Calcifying odontogenic cyst - Adenomatoid odontogenic tumor - Calcifying epithelial odontogenic tumor - Ameloblastic fibro-odontoma

Question 31

What is the malignant counterpart of the ameloblastic fibroma?

Answer 31

-Ameloblastic fibrosarcoma

Question 32

What is the avg age of a person who gets an ameloblastic fibrosarcoma?

Answer 32

-25-30

Question 33

What is the avg age of a person who gets and ameloblastic fibro-odontoma?

Answer 33

10

Question 34

Where do most ameloblastic fibrosarcomas occur?

Answer 34

-Mandible

Question 35

What is the most common odontogenic tumor?

Answer 35

-Odontoma

Question 36

What is an odontoma considered to be?

Answer 36

-considered to be developmental anomalies (hamartomas) rather than true neoplasms

Question 37

What is a compound odontoma?

Answer 37

-Composed of multiple small toothlike structures

Question 38

What is a complex odontoma?

Answer 38

-Conglomerate mass of enamel and dentin but bears no anatomic resemblance of a tooth

Question 39

What is the avg age of a person who gets an odontoma?

Answer 39

15

Question 40

Where is a compound odontoma more common in?

Answer 40

-Anterior maxilla

Question 41

Where is a complex odontoma more common in?

Answer 41

-Molar regions

Question 42

What is a central odontogenic fibroma's extraosseous counterpart?

Answer 42

-Peripheral odontogenic fibroma

Question 43

Where do myxomas only occur in?

Answer 43

-Jaws

Question 44

What jaw does an odontogenic myxoma occur in more commonly?

Answer 44

-Mandible

Question 45

What is a wispy trabeculae of residual bone associated with?

Answer 45

-Odontogenic myxoma