Chapter 15 Odontogenic Cysts and TUmors

Question 1

What is the definition of an odontogenic cyst?

Answer 1

-Pathologic cavity lined by odontogenic epithelium and filled with fluid

Question 2

What is a cyst that originates by separation of the follicle from around the crown of an unerupted tooth?

Answer 2

-Dentigerous Cyst

Question 3

What is the most common developmental cyst?

Answer 3

-Dentigerous cyst

Question 4

What is the definition of a dentigerous cyst?

Answer 4

-A cyst that originates by separation of the follicle from around the crown of an unerupted tooth

Question 5

A dentigerous cyst encloses the crown of the unerupted tooth and is attached at what?

Answer 5

-The CEJ

Question 6

What tooth do dentigerous cysts most commonly involve?

Answer 6

-Mandibular 3rd Molars

Question 7

What is the size of a dentigerous cyst?

Answer 7

Over 3 mm

Question 8

Are dentigerous cysts symptomatic or asymptomatic?

Answer 8

-Asymptomatic

Question 9

Why must dentigerous cysts be removed?

Answer 9

-They can expand bone and cause facial asymmetry

Question 10

T/F Dentigerous cysts often involve unerupted deciduous teeth

Answer 10

False

-Rarely involve

Question 11

What is the treatment of a dentigerous cyst?

Answer 11

-Enucleation of the cyst together with the unerupted tooth

Question 12

What is the soft tissue analogue of the dentigerous cyst?

Answer 12

-Eruption cyst

Question 13

What does an eruption cyst develop as a reulst of?

Answer 13

-Separation of the dental follicle from around the crown of an erupting tooth

Question 14

Who do you usually see eruption cysts in?

Answer 14

-Children younger than 10

Question 15

What are eruption cyst also called?

Answer 15

-Eruption hematomas

Question 16

What is the treatment for an eruption cyst?

Answer 16

-Cyst usually ruptures spontaneously or excise the roof of the cyst

Question 17

What are the two most important things about an odontogenic keratocyst?

Answer 17

• 30 % recurrence rate

- Associated with a syndrome

Question 18

Where do odontogenic keratocysts arise from?

Answer 18

-Cell rests of the dental lamina

Question 19

The WHO has reclassified an odontogenic keratocyst as what?

Answer 19

-Keratocystic odontogenic tumor

Question 20

What ages are most cases of Keratocystic odontogenic tumors diagnosed?

Answer 20

-Between 10-40

Question 21

What is the most common location of a keratocystic odontogenic tumor (Odontogenic keratocyst)?

Answer 21

-Posterior mandible

Question 22

How do Keratocystic odontogenic tumors tend to grow?

Answer 22

-Anterior-posterior direction

Question 23

T/F Odontogenic keratocyst cause bone expansion.

Answer 23

False

-They do not cause bone expansion

Question 24

Smaller odontogenic keratocyst are unilocular or multilocular?

Answer 24

-Unilocular

Question 25

Larger odontogenic keratocyst are unilocular or multilocular?

Answer 25

-Multilocular

Question 26

How are most odontogenic keratocysts treated?

Answer 26

• Enucleation

- Curettage

Question 27

An unerupted tooth is involved in how many cases?

Answer 27

1/3

Question 28

In an odontogenic keratocyst the epithelial lining is uniform and how many layers thick?

Answer 28

6-8 layers

Question 29

T/F Odontogenic keratocysts may have small satellite cysts away from primary lesion termed daughter cysts

Answer 29

True

Question 30

What does the pathology of odontogenic keratocysts have?

Answer 30

Thin friable wall

• Epithelial lining 6-8 layers thick
• Basal cell that palisades and is hyperchromatic
• Epithelium is surfaced by wavy Parakeratin

Question 31

What is the reason the recurrence rate of odontogenic keratocysts are 30%?

Answer 31

• Thin walls
• Daughter cysts
• Friable

Question 32

What is the other name for Nevoid basal cell carcinoma syndrome?

Answer 32

-Gorlin syndrome

Question 33

What chromosome is Gorlin syndrome associated with?

Answer 33

-Chromosome 9

Question 34

T/F Gorlin syndrome is AD inherited

Answer 34

True

Question 35

What gene on chromosome 9 is Gorlin syndrome associated with?

Answer 35

-PTCH

Question 36

What characterizes Gorlin syndrome?

Answer 36

• Multiple basal cell carcinomas
• Odontogenic keratocysts
• Calcification of the falx cerebri
• Rib anomalies

Question 37

What is one of the most constant features of Gorlin syndrome?

Answer 37

-Odontogenic keratocysts

Question 38

What is an odontogenic cysts with orthokeratinized lining and no basal palisading?

Answer 38

-Orthokeratinized Odontogenic Cyst

Question 39

Where do Orthokeratinized Odontogenic cyst occur most commonly??

Answer 39

-Posterior mandible

Question 40

T/F Orthokeratinized odontogenic cysts recur often

Answer 40

False

-They rarely recur

Question 41

What represents the soft tissue counterpart of the lateral periodontal cysts?

Answer 41

-Gingival cyst of the adult

Question 42

What is the Gingival cyst of the adult derived from?

Answer 42

-Rests of dental lamina (Rests of serres)

Question 43

Where do gingival cysts of the adult typically occur?

Answer 43

-Mandibular canine and premolar area

Question 44

What is the treatment for a gingival cyst of the adult?

Answer 44

-Surgical excision

Question 45

What is a developmental odontogenic cyst which typically occurs along the lateral root surface?

Answer 45

-Lateral periodontal cyst

Question 46

What is the bony counterpart of a gingival cyst of the adult?

Answer 46

-Lateral periodontal cyst

Question 47

Where does a lateral periodontal cyst arise from?

Answer 47

-Dental lamina

Question 48

“grape like”

Answer 48

-Lateral periodontal cyst