INBDE Oral Medicine and Oral Pathology

Question 1

A 45-year-old patient presents with a white patch on the lateral border of the tongue that cannot be wiped off. Biopsy reveals epithelial dysplasia. What is the most appropriate diagnosis?

Accepted Answer

Leukoplakia

Answer

Leukoplakia is a clinical term for a white patch that cannot be wiped off and has no other identifiable cause; dysplasia on biopsy confirms its premalignant potential.

Question 2

Which type of ameloblastoma is most commonly found in the posterior mandible and is characterized by islands of odontogenic epithelium within a fibrous stroma?

Accepted Answer

Solid/multicystic ameloblastoma

Answer

The solid/multicystic (conventional) ameloblastoma is the most common type, arising predominantly in the posterior mandible with classic histological patterns including follicular and plexiform subtypes.

Question 3

A patient with HIV presents with painless, bluish-purple nodules on the hard palate. What is the most likely diagnosis?

Accepted Answer

Kaposi's sarcoma

Answer

Kaposi's sarcoma is an AIDS-defining malignancy commonly presenting as blue-purple vascular lesions on the palate in HIV-infected individuals.

Question 4

A radiolucent lesion associated with the crown of an unerupted tooth is found on radiograph of a 20-year-old. Histology shows a thin epithelial lining with no dysplasia. What is the diagnosis?

Accepted Answer

Dentigerous cyst

Answer

A dentigerous cyst (follicular cyst) is the most common developmental odontogenic cyst, enclosing the crown of an unerupted tooth at the cementoenamel junction.

Question 5

Erythema multiforme most commonly affects young adults and is characterized by which pathognomonic skin lesion?

Accepted Answer

Target (iris) lesion

Answer

The target or iris lesion — concentric rings of erythema — is the hallmark cutaneous lesion of erythema multiforme.

INBDE - Integrated National Board Dental Exam Practice Test

INBDE - Integrated National Board Dental Exam Practice Test

INBDE Oral Medicine and Oral Pathology