Exam 5-Odontogenic Tumors Flashcards Preview

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Flashcards in Exam 5-Odontogenic Tumors Deck (76):
1

What are the three classes of odontogenic tumors based on their tissue of origin?

1.Ectodermal (epithelial) 2.Mesodermal (connective tissue) 3. Mixed

2

What are the 4 types of ectodermal (epithelial) odontogenic tumors?

1.Ameloblastoma 2. Calcifying Epithelial Odontogenic Tumor 3.Adenomatoid Odontogenic Tumor (AOT) 4.Squamous Odontogenic Tumor (SOT)

3

What is the most likely age range for Ameloblastoma?

Middle age (mid 30's-40's)

4

Where are most Ameloblastomas found?

75% in the mandible, and more often in the posterior mandible

5

What is usually the first clinical sign of an Amelioblastoma?

Swelling (cortical expansion)

6

Radiographically: Amelioblastoma May be pericoronal, always radio______, fairly well _______. Classically multi_____, move teeth, and can cause root _______

lucent... circumscribed.....multilocular....resporption

7

The histo-path of an Ameloblastoma is described as epithelial _______ and cords

islands

8

If you had only two phrases to describe the histology of an Ameloblastoma, what would they be??

peripheral cells that show 1.PALISADING (columnar) and 2.REVERSE NUCLEAR POLARITY

9

An ameloblastoma has an interesting spread pattern, it can invade ______ bone, but tends to EXPAND the ______ bone.

invades medullary bone....expands cortical bone

10

What is the treatment for an ameloblastoma? What is the recurrence rate?

aggressive curettage...50%

11

Is a peripheral (extraosseus) ameloblastoma MORE or LESS aggressive??

LESS aggressive

12

What is the term for an ameloblastoma that is a solitary cyst in which the it is CONFINED to the epithelial lining or cyst lumen...IS it more or less aggressive? What is the recurrence rate with enucleation?

UNICYSTIC...less aggressive, recurrence 10-25% with enucleation

13

What are the two variants of ameloblastoma that metastasize?

1.Malignant ameloblastoma 2.Ameloblastic carcinoma

14

Can you definitively diagnose variants of ameloblastoma via an incisional biopsy?

Nope

15

What is another name for a Calcifying Epithelial Odontogenic Tumor?

Pindborg Tumor (CEOT)

16

What is the "official" name of a Pindborg tumor?

Calcifying Epithelial Odontogenic Tumor

17

What is the most common location for an CEOT (Pindborg Tumor)?

midbody of the mandible

18

Since the radiographic appearance of CEOT is radiolucent and mixed radiolucent/opaque, what is the nickname for the lesion?

"driven snow"

19

What is a CEOT (Pindborg Tumor) often associated with?

Unerupted teeth (pericoronal)

20

What type of ectodermal odontogenic tumor is described as islands and sheets of pleomorphic epithelial cells?

Calcifying Epithelial Odontogenic tumors (Pondborg tumor)

21

Interesting...in a CEOT (Pindborg Tumor) tumor cells are ______ and produce protein matrix similar to ______ matrix (stains with amyloid stains) and may calcify.

functional...enamel

22

What is the most common age range, sex, and placement of an Adenomatid Odontogenic Tumor (AOT)?

Teenage girls, maxillary anterior region (associated with uninterupted teeth)

23

How does an AOT appear on a radiograph? (2 descriptions please)

Radiolucent (pericoronal), flecks of opacity

24

Which epithelial odontogenic tumor am I describing?? Encapsulated, swirls of epithelial cells containing rosettes or DUCT-like spaces lined by cuboidal or columnar cells.

Adeno-Matid Odontogenic Tumor

25

What is the treatment for an AOT?

Adeno-matid odontogenic tumors get ENUCLEATED (they come out real easy)

26

Which odontogenic tumor is not distinguishable clinically, and appears as islands of well-differentiated squamous epithelium and the peripheral layer of cells flattened...

Squamous Odontogenic Tumor (SOT)

27

What does a Squamous Odontogenic Tumor appear as radiographically?

RadioLUCENT around tooth roots

28

What is a positive about SOTs?

Low recurrence rate with curettage

29

What are the 4 types of MESODERMAL odontogenic tumors?

1.Central Odontogenic Fibroma 2.Peripheral Odontogenic Fibroma 3.Odontogenic Myxoma 4.Cementum Lesions

30

What are the three types of cementum lesions?

1.Central cemento-ossifying fibroma (ossifying fibroma, cementifying fibroma) 2.Benign cementoblastoma (TRUE cementoma) 3.Gigantiform cementoma

31

Which mesodermal odontogenic tumor currently is described as simple and WHO types? (will change soon)...

Central Odontogenic Fibroma

32

How might a central odontogenic fibroma appear on a radiograph?

lucent to mixed lucent/opaque

33

Which mesodermal odontogenic tumor is described as a reactive gingival lesion of PDL origin? What age group is it most prevalent in? What ragion of the mouth?

Peripheral Odontogenic fibroma...young people, anterior gingiva

34

What type of odontogenic tumor is this describing?: Cellular fibrous connective tissue with calcifications, bone, cementum, dystrophic.

Peripheral Odontogenic fibroma

35

What are two normal developmental tooth structures that are often confused with an odontogenic myxoma?

dental papilla and hyperplastic dental follicle

36

Although an odontogenic myxoma can occur in all ages, which age group is it seen the most?

young peeps

37

An odontogenic myxoma often presents radiographically as Lucency often containing residual opaque _______

trabeculae

38

Which mesodermal odontogenic tumor is this describing?Hypocellular tumor, scattered plump fibroblastic cells. Delicate collagen fibrils and abundant ground substance
(glycosaminoglycans).

Odontogenic Myxoma

39

What is the treatment of an odontogenic myxoma and why?

BLOCK rescetion...curettage has a HIGH recurrence rate

40

What is the neoplasm of PDL origin that is more common among black females in the mandible?

central cemento-ossifying fibroma (ossifying fibroma)

41

What are the symptoms presented with a central cemento-ossifying fibroma?

ASYMPTOMATIC

42

Even though this odontogenic tumor is associated with roots, the teeth should be VITAL!

Central cemento-ossifying fibroma

43

LOL, how does a central cemento-ossifying fibroma present radiographically? (radiopaque?lucent?)

Completely lucent to mixed lucent/opaque to mostly opaque...LOL

44

Which type of odontogenic tumor is this describing? Very cellular fibroblastic stroma (fibroma) containing trabeculae of bone with cellular inclusions (ossifying) or
“globules” of acellular cementum (cementifying) or both (cemento-ossifying). Usuallyencapsulated....

Central cemento-ossifying fibroma

45

How is a central cemento-ossifying fibroma treated?

enucleated

46

What is the nickname for a benign cementoblastoma?

a TRUE cementoma

47

What is the most common age group and place for a true cementoma (bengin cementoblastoma)?

2-4th decades of life, in the mandibular first molar area

48

What is the distinguishing factor between a benign cementoblastoma and condensing osteitis?

cementoblastoma-tooth is VITAL, condensing osteitis-non-vital

49

What are three distinguishing radiographic factors of a benign cementoblastoma?

1.Radiopaque 2.Ankylosed 3.Encapsulated

50

What type of odontogenic tumor is this describing? Sclerotic trabeculae of cementum with variable amounts of “active” fibroblastic stroma with giant cells. Peripheral trabeculae characteristically at right angles to surface. Central trabeculae fused to tooth root....

Benign cementoblastoma (true cementoma)

51

What is the recurrence rate of a benign cementoblastoma?

0-37%

52

What is the extremely rare cementum lesion that is purely genetic-autosomal dominant?

Gigantiform cementoma

53

What is unique about the location of Gigantiform cementoma?

MULTI-quadrant globular opacities

54

Which odontogenic tumor is Globular, sclerotic masses of cementum, Histology not diagnostic, and is usually not treated?

Gigantiform cementoma

55

What are the three types of mixed odontogenic tumors?

1.Ameloblastic fibroma 2.Ameloblastic fibro-odontoma 3.Odontoma

56

When and where does an ameloblastic fibroma occur? What are the symptoms?

decades 1-3 (if you have one past 30 years old, it was made when you were younger)....found in the mandibular posterior...ASYMPTOMATIC

57

How does an Ameloblastic fibroma appear on a radiograph?

ALWAYS radioLUCENT

58

Which odontogenic tumor is this describing? Long strands or cords of epithelial cells resembling dental lamina in a highly cellular connective tissue of fibroblasts and delicate collagen fibrils....

Ameloblastic Fibroma (mixed odontogenic tumor)

59

An ameloblastic fibroma is characterized by long strands or cords of EPITHELIAL cells resembling _________ in a highly cellular CONNECTIVE tissue of fibroblasts and delicate collagen fibrils.

DENTAL LAMINA

60

What is the only variant of an ameloblastic fibroma?

Ameloblastic FIBROsarcoma (malignant transformation of mesenchymal (fibrous connective tissue) component)

61

Which type of mixed odontogenic tumor shows SOME areas like an ameloblastic fibroma and OTHER areas like an odontogenic tumor (enamel,dentin, cementum formation)??

An ameloblastic FIBRO-ODONTOMA

62

Which two odontogenic tumors present with palisading peripheral cells with reverse nuclear polarity?

1. Ameloblastoma 2. Ameloblastic Fibro-odontoma

63

When does an Ameloblastic fibro-odontoma occur? What are the symptoms?

1-3 decades...ASYMPTOMATIC

64

What are the radiographic findings for an Ameloblastic fibro-odontoma? (hint-its an odontogenic tumor of MIXED origin), where will you OFTEN find these?

mixed radiolucent/opaque...often found overlying an unerupted tooth

65

Not sure I understand this, but what the hell...Which odontogenic tumor is this??: In
functional areas, morphology recapitulates normal odontogenesis in that epithelial component “opens up” like enamel organ

Ameloblastic Fibro-Odontoma

66

WHAT IS THE MOST COMMON ODONTOGENIC TUMOR??? What type of odontogenic tumor is it?

an ODONTOMA...its a mixed (epithelial and connective tissue) odontogenic tumor

67

The MOST COMMON odontogenic tumor: an odontoma, is both epithelial and _________ cells functional and produce products of odontogenesis.

mesenchymal (they are just little teeth :)

68

The MOST COMMON odontogenic tumor: an odontoma,Viewed as a developmental ________, not a neoplasm

hamartoma (a tumor resembling the normal surrounding tissue)

69

The VERY UNIQUE radiographic presentation of an odontoma: Radio_____ with thin _____ border (follicle) often overlying unerupted teeth.

opaque...lucent border

70

What are the two types of radiographic presentations of an odontoma?

Compound and Complex

71

In a compound odontoma it appears ______ like and it is mainly found in the _______ jaws

TOOTH...anterior

72

In a complex odontoma it appears more like a ______ deposition and it is mainly found in the _____ jaws

RANDOM...posterior

73

What other type of odontogenic tumor can an EARLY odontoma resemble?

Ameloblastic fibro-odontoma

74

A LATE odontoma will show what signs?

mature enamel, dentin, cementum, and PULP!

75

The typical treatment for odontomas is surgical resection because they can develop complications...what are two examples of complications?

a dentigerous cyst or ameloblastoma

76

Which 4 odontogenic tumors are associated with UNERUPTED TEETH?

1.CEOT 2.AOT 3.Ameloblastic Fibro-Odontoma 4. Odontoma