odontogenic cyst and tumor

Question 1

Are cysts or tumors more common?

Answer 1

Cysts are relatively common, while tumors are uncommon.

Question 2

What kind of lining do cysts have?

Answer 2

Epithelial lining.

Question 3

What is the most common developmental odontogenic cyst?

Answer 3

Dentigerous cyst.

Question 4

Where does a dentigerous cyst form?

Answer 4

Around the crown of unerupted teeth.

Question 5

Where are dentigerous cysts most often found?

Answer 5

3rd mandibular molars.

Question 6

What age range is most prevalent for dentigerous cysts?

Answer 6

Between 10-30 years old.

Question 7

What does a dentigerous cyst look like on an X-ray?

Answer 7

Well defined, unilocular, radiolucent area associated with unerupted tooth crown.

Question 8

How do you diagnose a dentigerous cyst?

Answer 8

Mandatory histopathologic examination.

Question 9

What is an eruption cyst?

Answer 9

A dentigerous cyst that forms around the crown of an erupting tooth.

Question 10

Where does a periapical cyst form?

Answer 10

At the apex of a non-vital tooth.

Question 11

What is the most common cyst of the jaws?

Answer 11

Periapical cyst.

Question 12

What is a lateral radicular cyst?

Answer 12

Similar to a periapical cyst.

Question 13

Where do lateral radicular and periapical cysts arise from?

Answer 13

Rests of Malassez.

Question 14

Where is a lateral radicular cyst located?

Answer 14

Lateral canal of a non-vital tooth.

Question 15

What is a gingival cyst of the newborn?

Answer 15

Keratin filled cyst on alveolar mucosa of infants.

Question 16

Are gingival cysts of the newborn common?

Answer 16

Yes.

Question 17

What happens to most gingival cysts of the newborn?

Answer 17

Most rupture spontaneously.

Question 18

What does a gingival cyst of the newborn look like?

Answer 18

Yellow white papule on alveolar ridge of newborn infants.

Question 19

Where are gingival cysts of the newborn most often found?

Answer 19

Maxilla.

Question 20

What is a gingival cyst of the adult?

Answer 20

Soft tissue counterpart of lateral periodontal cyst.

Question 21

Where are gingival cysts of adults usually located?

Answer 21

Mandibular canine/premolar area.

Question 22

What color is a gingival cyst of the adult?

Answer 22

Bluish or blue-gray.

Question 23

What is a lateral periodontal cyst?

Answer 23

Developmental cyst lateral to a tooth.

Question 24

Where are lateral periodontal cysts usually located?

Answer 24

Mandibular premolar area.

Question 25

What syndrome is associated with multiple odontogenic keratocysts (OKC)?

Answer 25

Nevoid basal cell carcinoma syndrome (Gorlin syndrome).

Question 26

What gene mutation is associated with multiple OKC?

Answer 26

Mutation of PTCH gene.

Question 27

What skin condition is associated with multiple OKC?

Answer 27

Multiple basal cell carcinoma of skin.

Question 28

Where are odontogenic keratocysts (OKC) often found?

Answer 28

Mandible.

Question 29

What type of teeth is an odontogenic keratocyst (OKC) associated with?

Answer 29

Unerupted tooth.

Question 30

Are odontogenic keratocysts (OKC) prone to recurrence?

Answer 30

Yes, recurrence is common.

Question 31

Where are glandular odontogenic cysts most often found?

Answer 31

Anterior mandible.

Question 32

What should glandular odontogenic cysts be differentiated from?

Answer 32

Central low grade mucoepidermoid carcinoma.

Question 33

What is a common feature of calcifying odontogenic cysts?

Answer 33

Commonly cystic.

Question 34

Where are calcifying odontogenic cysts usually located?

Answer 34

Incisor/canine region.

Question 35

Where is a peripheral calcifying odontogenic cyst found?

Answer 35

In gingival soft tissue.

Question 36

What kind of feature does a calcifying odontogenic cyst have?

Answer 36

Central calcification.

Question 37

What kind of cells are present in a calcifying odontogenic cyst?

Answer 37

Ghost cells.

Question 38

What is the most common odontogenic tumor?

Answer 38

Odontoma.

Question 39

What kind of lesion is an odontoma considered?

Answer 39

Hamartoma.

Question 40

What does a compound odontoma consist of?

Answer 40

Toothlets.

Question 41

What does a complex odontoma consist of?

Answer 41

Disorganized mass of dentin/enamel.

Question 42

What is the most common clinically significant odontogenic tumor?

Answer 42

Ameloblastoma.

Question 43

How does an ameloblastoma grow?

Answer 43

Slow growing, locally invasive tumor.

Question 44

Where are ameloblastomas most often found?

Answer 44

Mandible.

Question 45

What effects does an ameloblastoma have on bone?

Answer 45

Expansion of bone.

Question 46

What dental feature is associated with ameloblastomas?

Answer 46

Associated with unerupted teeth.

Question 47

What histologic feature is associated with ameloblastomas?

Answer 47

Piano key histology.

Question 48

Where are adenomatoid odontogenic tumors most frequently found?

Answer 48

Anterior maxilla.

Question 49

What effect do adenomatoid odontogenic tumors have on roots?

Answer 49

Splaying of roots.

Question 50

How does an adenomatoid odontogenic tumor extend in relation to the CEJ?

Answer 50

Extends apically beyond CEJ, unlike a dentigerous cyst.

Question 51

What is the appearance of odontogenic myxoma?

Answer 51

Soap bubble appearance.

Question 52

What kind of neoplasm is an ameloblastic fibroma?

Answer 52

Benign mixed odontogenic neoplasm.