Week 12: Odontogenic Tumors

Question 1

what does “-genic” mean?

Answer 1

give rise to, offspring

Question 2

tumors that arise from tissues associated with tooth development

Answer 2

odontogenic tumors

Question 3

**

Answer 3

**

Question 4

benign tumor of odontogenic epithelium

Answer 4

ameloblastoma, adenomatoid odontogenic tumor

Question 5

three types of ameloblastoma

Answer 5

multicystic, cystic, peripheral

Question 6

micro appearance of ameloblastoma

Answer 6

columnar epithelial cells, stellate reticulum cells

Question 7

ameloblastomas are _______ but cured with ______ resection

Answer 7

locally aggressive, surgical

Question 8

multicystic ameloblastoma characteristics

Answer 8

• intraosseous
• very large
• usually on mandible in patients > 25
• soap bubble appearance

Question 9

cystic ameloblastoma characteristics

Answer 9

• intraosseous
• large
• usually in young patients (16-20)
• near crown of impacted tooth

Question 10

peripheral ameloblastoma characteristics

Answer 10

• extraosseous
• small
• firm moveable module in gingiva
• occurs in older patients

Question 11

adenomatoid odontogenic tumor characteristics

Answer 11

• benign
• usually in young patients (14-15)
• not aggressive

Question 12

gross appearance of adenomatoid odontogenic tumor

Answer 12

unilobular cyst

Question 13

micro appearance of adenomatoid odontogenic tumor

Answer 13

resembles granular tissue

Question 14

gross appearance of odontogenic myxoma

Answer 14

intraosseous mass with multiple cystic spaces (soap bubbles)

Question 15

micro appearance of odontogenic myxoma

Answer 15

undifferentiated cells in abundant myxoid (ground substance) background, sometimes collagen fibers

Question 16

characteristics of odontogenic myxoma

Answer 16

• benign
• aggressive
• treated with block excision

Question 17

benign tumor of odontogenic connective tissue

Answer 17

odontogenic myxoma

Question 18

benign tumor of cementoblasts

Answer 18

cementoblastoma

Question 19

cementoblastoma characteristics

Answer 19

• rare
• peak age 19
• painful lesion in molar/premolar area
• treated by removing tumor and tooth

Question 20

gross appearance of cementoblastoma

Answer 20

well-circumscribed mass in continuity with cementum of tooth

Question 21

micro appearance of cementoblastoma

Answer 21

cementum-like tissue with loose intervening stroma

Question 22

most common odontogenic tumor (70% of all odontogenic tumors)

Answer 22

odontoma

Question 23

characteristics of odontomas

Answer 23

• common
• usually occurs in patients under 20
• found adjacent to unerupted teeth
• easily removed from bone, doesn’t recur

Question 24

micro appearance of odontomas

Answer 24

a mixture of tooth components (enamel,

dentin, pulp and cementum)

Question 25

two types of odontomas

Answer 25

• complex (gnarled mass of tissue)

- compound (toothlets)