NBDE Oral Pathology and Radiology 2

Question 1

A radiolucent lesion with a 'soap bubble' multilocular appearance at the posterior mandible in a young adult is most consistent with:

Accepted Answer

Ameloblastoma

Answer

Ameloblastoma classically presents as a multilocular 'soap bubble' or 'honeycomb' radiolucency, most often in the posterior mandible of adults.

Question 2

Koilocytes found on cytologic smear are pathognomonic for infection with:

Accepted Answer

Human papillomavirus

Answer

Koilocytes are HPV-infected epithelial cells showing perinuclear clearing (halo) and nuclear enlargement, serving as a hallmark of HPV infection.

Question 3

On a periapical radiograph, the lamina dura appears as a thin radiopaque line because it represents:

Accepted Answer

Cortical bone lining the alveolar socket

Answer

The lamina dura is dense cortical bone lining the tooth socket, appearing radiopaque due to its compact nature compared to surrounding cancellous bone.

Question 4

Pindborg tumor (calcifying epithelial odontogenic tumor) characteristically shows which radiographic feature?

Accepted Answer

Diffuse 'driven snow' calcifications within a radiolucency

Answer

CEOT (Pindborg tumor) contains amyloid-like material that calcifies, producing scattered 'driven snow' or 'snowflake' opacities within a radiolucent lesion.

Question 5

A patient presents with multiple radiopaque masses along the jaw resembling condensed bone fused to tooth roots. This most likely represents:

Accepted Answer

Florid cemento-osseous dysplasia

Answer

Florid cemento-osseous dysplasia presents as multiple bilateral, large lobular cemento-osseous masses replacing normal bone, predominantly in Black women.

NBDE - National Board Dental Examination Practice Test

NBDE - National Board Dental Examination Practice Test

NBDE Oral Pathology and Radiology 2