Oral Pathology and Radiology Flashcards
7 cards from real NBDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Oral Pathology and Radiology flashcards as text
The 'double cortical outline' sign on a panoramic radiograph of the mandibular canal is associated with:
Answer: Inferior alveolar nerve schwannoma
A schwannoma of the inferior alveolar nerve can expand the mandibular canal, creating a double cortical outline (canal-within-canal) appearance radiographically.
Hairy leukoplakia of the tongue in an HIV-positive patient is caused by:
Answer: Epstein-Barr virus replication in epithelial cells
Oral hairy leukoplakia is caused by EBV replication in epithelial cells of the lateral tongue, producing corrugated white plaques that cannot be wiped off.
The radiopaque structure overlying the roots of maxillary premolars most commonly misidentified as periapical pathology is:
Answer: Zygomatic process of the maxilla
The zygomatic process of the maxilla projects as a J-shaped or U-shaped radiopacity over the maxillary first premolar/molar roots and must not be confused with hypercementosis or condensing osteitis.
Pemphigus vulgaris of the oral cavity is distinguished from mucous membrane pemphigoid by:
Answer: Suprabasilar acantholysis (intraepithelial clefting) versus subepithelial split
Pemphigus vulgaris shows suprabasilar acantholysis (loss of cohesion above the basal layer), while mucous membrane pemphigoid features a subepithelial blister below the intact epithelium.
A painless, fluctuant, bluish sublingual swelling that displaces the tongue is best diagnosed as:
Answer: Ranula (retention phenomenon of sublingual gland)
A ranula is a mucous retention or extravasation pseudocyst arising from the sublingual gland, presenting as a translucent blue swelling in the floor of the mouth.
In interpreting panoramic radiographs, the 'ghost image' artifact appears because:
Answer: A structure outside the focal trough is imaged bilaterally with a magnified, blurred contralateral projection
Ghost images form when a radiopaque structure outside the focal trough is projected to the contralateral side at a higher, more blurred, and magnified position due to the rotating X-ray source geometry.
Cherubism is a hereditary fibro-osseous condition characterized by all of the following EXCEPT:
Answer: Progressive course into adulthood without spontaneous regression
Cherubism typically stabilizes at puberty and often undergoes spontaneous partial regression in adulthood, unlike progressive fibro-osseous diseases.