AGD Oral Diagnosis and Pathology 3

Question 1

Erythroplakia of the oral mucosa carries a malignant transformation rate of approximately:

Accepted Answer

50%

Answer

Erythroplakia has a malignant transformation rate of approximately 50%, making it far more dangerous than leukoplakia.

Question 2

A teenager presents with a well-defined unilocular radiolucency surrounding the crown of an unerupted mandibular third molar. This most likely represents:

Accepted Answer

Dentigerous cyst

Answer

A dentigerous (follicular) cyst forms around the crown of an unerupted tooth, presenting as a pericoronal radiolucency.

Question 3

Which oral manifestation is MOST characteristic of primary herpetic gingivostomatitis?

Accepted Answer

Multiple small vesicles that rupture leaving painful ulcers with generalized gingival erythema

Answer

Primary HSV-1 infection produces multiple vesicles that rupture into painful ulcers accompanied by diffuse gingival erythema, fever, and lymphadenopathy.

Question 4

Melanotic macule of the lip differs from an oral melanoma primarily by:

Accepted Answer

Lack of epithelial atypia and absence of junctional activity

Answer

Melanotic macule shows increased melanin in basal cells without melanocyte atypia or junctional activity, distinguishing it from early melanoma.

Question 5

'Soap bubble' or multilocular radiolucency in the posterior mandible of a young adult is the classic radiographic presentation of:

Accepted Answer

Ameloblastoma

Answer

Ameloblastoma classically presents as a multilocular soap-bubble or honeycomb radiolucency in the posterior mandible of adults in the third to fourth decade.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Oral Diagnosis and Pathology 3