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Oral Pathology > Odontogenic Tumors > Flashcards

Odontogenic Tumors Flashcards

1
Q

sources of tumor cells in ameloblastoma

A

may originate from dental lamina dura, developing enamel organ, odontogenic cyst lining, alveolar mucosa

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2
Q

different types of ameloblastoma

A
  1. solid / mutlicystic / convenitonal
  2. unicystic
  3. demoplastic
  4. peripheral ameloblastoma
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3
Q

most common location of ameloblastoma

A

posteiror mandible

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4
Q

clinical features of ameloblastoma

A

asymtomatic, often discovered on routine radiographs

as tumors grow, painless enlargement may be noted

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5
Q

radiographic features of ameloblastoma

A
  1. unilocular radiolucency, especially early lesions that often progress to multilocular (soap bubble)
  2. may be associated with impacted tooth
  3. cortical expansion and thinning
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6
Q

two most common histological variants of ameloblastoma

A

follicular
plexiform

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7
Q

follicular ameloblastoma

A

islands of adontogenic epitehlium

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8
Q

plexiform ameloblastoma

A

interconnected strands of eptihlium

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9
Q

peripheral cells

A

resemble ameoloblasts (columnar with palisaded nuclei away form basement membrane, reverse nuclear polarity)

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10
Q

central cells

A

dendritic extensions that interdigitate, resemble stellate reticulum

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11
Q

treatment of ameloblastoma

A

complete surgical incision

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12
Q

treatment of larger lesions ameloblastoma

A

en bloc or segmental resection

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13
Q

treatment of smaller ameloblastoma lesions

A

aggressive curittage
liquid nitrogen

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14
Q

prognosis of ameloblastoma

A

depends on tumor size, extent, locaiton

maxillary tumors may extend into sinonasal cavity and beyond

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15
Q

recurrence potential of ameloblastoma

A

recurrence varies with type of treatment, lesion length of follow up

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16
Q

demographic of calcifying epitehlial odontogenic tumor

A

20-60 years (mean 40)

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17
Q

clinical featores of CEOT

A

slow growing painless swelling

often associated with impacted tooth, third molar

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18
Q

radiographic features of CEOT

A

radiolucent, with or without driven snow radiopacities

uni / multilocular

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19
Q

microscopic features of CEOT

A

islands and sheets of polyhedral cells with abundant eosinophilic cytoplasm, sharply defined cytoplasmic borders and well developed intercellular bridge

variable pleomorphism of cell and nculei (giant nuclei) but without mitotic figures

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20
Q

stain techniqeu used to detect presence of amyloid in tumors

A

congo red

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21
Q

liesegang ring resembles

A

lamellated calcifications

22
Q

rate of recurrence of CEOT

A

up to 15%

greater tendency to recur if treated with curettage

23
Q

tissue of origin of adenomatoid odontogenic tumor

A

enamel organ or dental lamina origin

24
Q

demogrpahics of AOT

A

90% <30 years, 50% teens

Females > males

Anterior maxilla and mandible

Most common area: impacted maxillary canine

25
Q

clinical featores of AOT

A

-displacement of teeth
-cortical bony hard expansion

26
Q

radiographic features of aot

A

When associated with impacted teeth, tendency for radiolucent argin to extend apically past the CEJ

27
Q

dentigerous cyst vs AOT on radiographic

A

dentigerous cyst stops at cervical margin

aot radiolucency can go way beyond the cervical marign

28
Q

histopathological features of AOT

A

-thick capsule
-sheets of eptihelial cells, cellular whorles (rosettes) and duct like structures resembling glandular (adenomatoid) tissue

29
Q

treatment of AOT

A

enucleation

30
Q

demographics of ameloblastic fibroma

A

1st and 2nd decade

mean 14.8

31
Q

clinical features of ameloblastic fibroma

A

posteiror mandible
painless swelling

32
Q

radiographic features of ameloblastic fibroma

A

unilocular radiolucency, often wit unerupted tooth (50%), may become multilocular

33
Q

histopathology of ameloblastic fibroma

A

anastomosoing strands, knots of eptihelium

34
Q

treatment of amelolastic fibroma

A

conservative excision, aggressive curettage

35
Q

two types of odontomas

A

compound
complex

36
Q

compoudn odontoma

A

usually anteiror jaw

37
Q

complex odontoma

A

usually posteiror jaw

38
Q

radiographic features of compound odontoma

A

collection of tiny tooth-like denticles, surrounded by lucen zone (soft tissue capsule)

39
Q

radiographic features of complex odontoma

A

opacity surrounded by broad zone of lucency (soft tissue capsule)

40
Q

clinical features of compound odontoma

A

dysmorphic tooth germs, enamel matrix due to decalcification

41
Q

clinical features of complex odontoma

A

irregular convoluted mass of dentin, enamel matrix, cementoid tissue

ghost cells

42
Q

demogrpahics of odontogenic myxoma

A

Age range: 1-73 years (mean 30)

Slightly more common in females

43
Q

preferred location of odontogenic myxoma

A

2/3 cases in mandible (molar region)

44
Q

clinical features of odontogenic myxoma

A

Painless expansion, cortical perforation

Maxillary tumors fill up sinus early

45
Q

radiogrpahic features of odontogenic myxoma

A

Multilocular, honeycomb appearance in radiographs

Short straight bone septa

46
Q

management of small odontogenic myxoma lesions

A

aggressive curettage

47
Q

management of larger odontogenic myxoma

A

marginal or en bloc resection

48
Q

demographics of cementoblastoma

A

Age 8-44 years (mean 20)

No gender preference

49
Q

location of cementoblastoma

A

posterior mandible

especially 1st permanent molar

50
Q

clinical features of cementoblastoma

A

Pain and swelling often presenting features

Rarely, lower lip paresthesia or pathologic fracture of mandible

51
Q

radiograhic features of cementoblastoma

A

Opaque mass fused to root(s), thin lucent rim around mass

Tooth resorption, loss of root outline, obliteration of periodontal ligament

Oral Pathology (14 decks)

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