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Oral Pathology 2020 > Chapter 15 lecture 3 > Flashcards

Chapter 15 lecture 3 Flashcards

1
Q

Where do ameloblastomas infiltrate between?

A
  • Cancellous bone

- Lesion periphery

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2
Q

What is the most widely used treatment to remove an ameloblastoma?

A

-Marginal resection

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3
Q

How far beyond the margins do surgeons take out an ameloblastoma?

A

-1.5 cm

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4
Q

What does a peripheral ameloblastoma look like?

A
  • Painless
  • Nonulcerated
  • Sessile gingival lesion
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5
Q

Where are peripheral ameloblastomas most commonly found and are they more on the maxilla or mandible?

A

-Posterior gingival mucosa on the mandible

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6
Q

What is the recurrence of a peripheral ameloblastoma?

A

15% the first time almost 0% the second time

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7
Q

Malignant ameloblastomas shows metastatic deposits where most commonly?

A

-Lung

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8
Q

T/F A malignant ameloblastoma is not cancerous

A

True

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9
Q

T/F An ameloblastic carcinoma is not cancerous

A

False

-It is cancerous

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10
Q

When do ameloblastic carcinomas develop?

A

-Later in life than conventional ameloblastomas and malignant ameloblastomas

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11
Q

A malignant ameloblastoma has histologic features that look similar to what?

A

-Conventional ameloblastoma

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12
Q

What age does an adenomatoid odontogenic tumor occur in?

A

-10-20

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13
Q

What gender and area do adenomatoid odontogenic tumors most commonly occur?

A
  • Anterior maxilla

- Females

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14
Q

Adenomatoid odonteginc tumors are asymptomatic and discovered during and XRAY to determine why a tooth hasn’t erupted, what tooth is most often involved?

A

-Canine

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15
Q

In 75% of adenomatoid odonteogenic tumors the tumor is what?

A

-Circumscribed, unilocular radiolucency involving the crown of an unerupted tooth

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16
Q

What helps determine and adenmatoid odontgenic tumor from a dentigerous cyst?

A
  • Radiolucency often extends apically past the CEJ

- Snowflake calcifications

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17
Q

What might the lesions look like in an XRAY for and adenomatoid odontgenic tumor?

A

-Snowflake calcifications

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18
Q

T/F Adenomatoid odontogenic tumors are malignant

A

False

-They are completely benign

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19
Q

What is a calcifying epithelial odontogenic tumor aka?

A

-Pindborg Tumor

20
Q

Where do calcifying epithelial odontogenic tumors most often occur?

A

-Posterior mandible

21
Q

What is the most common presenting sign of a calcifying epithelial odontogenic tumor?

A
  • Painless

- Slow growing swelling

22
Q

What does “driven snow” pattern deal with?

A

-Calcifying epithelial odontogenic tumor

23
Q

What impacted tooth is a calcifying epithelial odontogenic tumor most often associated with?

A

-Mandibular molar

24
Q

What are the calcifications with concentric rings formed in the amyloid like areas in a calcifying epithelial odontogenic tumor known as?

A

-Liesegang rings

25
Q

What is the stain they use to exhibit and apple-green birefringence in a calcifying epithelial odontogenic tumor?

A

-Congo Red

26
Q

What is an ameloblastic fibroma?

A

-True mixed tumor that has both epithelial and mesenchymal tissues that are neoplastic

27
Q

What age to ameloblastic fibromas usually occur?

A

-Before age 20

28
Q

Where are most ameloblastic fibromas located?

A

-Posterior mandible most commonly with an unerupted tooth

29
Q

What does the histology of an ameloblastic fibro-odontoma appear similar to?

A

-Ameloblastic fibroma except the ameloblastic fibro-odontoma has enamel and dentin

30
Q

What are the four differentials that have calcifications?

A
  • Calcifying odontogenic cyst
  • Adenomatoid odontogenic tumor
  • Calcifying epithelial odontogenic tumor
  • Ameloblastic fibro-odontoma
31
Q

What is the malignant counterpart of the ameloblastic fibroma?

A

-Ameloblastic fibrosarcoma

32
Q

What is the avg age of a person who gets an ameloblastic fibrosarcoma?

A

-25-30

33
Q

What is the avg age of a person who gets and ameloblastic fibro-odontoma?

A

10

34
Q

Where do most ameloblastic fibrosarcomas occur?

A

-Mandible

35
Q

What is the most common odontogenic tumor?

A

-Odontoma

36
Q

What is an odontoma considered to be?

A

-considered to be developmental anomalies (hamartomas) rather than true neoplasms

37
Q

What is a compound odontoma?

A

-Composed of multiple small toothlike structures

38
Q

What is a complex odontoma?

A

-Conglomerate mass of enamel and dentin but bears no anatomic resemblance of a tooth

39
Q

What is the avg age of a person who gets an odontoma?

A

15

40
Q

Where is a compound odontoma more common in?

A

-Anterior maxilla

41
Q

Where is a complex odontoma more common in?

A

-Molar regions

42
Q

What is a central odontogenic fibroma’s extraosseous counterpart?

A

-Peripheral odontogenic fibroma

43
Q

Where do myxomas only occur in?

A

-Jaws

44
Q

What jaw does an odontogenic myxoma occur in more commonly?

A

-Mandible

45
Q

What is a wispy trabeculae of residual bone associated with?

A

-Odontogenic myxoma

Oral Pathology 2020 (38 decks)

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