DDS Oral Pathology and Oral Medicine 2 — Questions and Answers
Question 1: Squamous cell carcinoma of the oral cavity has the highest incidence in which site?
- Hard palate
- Dorsal tongue
- Lateral and ventral tongue/floor of mouth (Correct answer)
- Buccal mucosa
Correct answer: Lateral and ventral tongue/floor of mouth
The lateral/ventral tongue and floor of mouth together represent the most common sites for oral squamous cell carcinoma in the United States.
Question 2: Which salivary gland neoplasm is the most common malignant tumor of the parotid gland?
- Warthin tumor
- Mucoepidermoid carcinoma (Correct answer)
- Acinic cell carcinoma
- Adenoid cystic carcinoma
Correct answer: Mucoepidermoid carcinoma
Mucoepidermoid carcinoma is the most common malignant salivary gland tumor overall and the most common malignancy of the parotid gland.
Question 3: Central giant cell granuloma of the jaw is histologically characterized by:
- Ameloblast-like cells lining a cystic cavity
- Multinucleated giant cells in a fibrous connective tissue stroma (Correct answer)
- Calcified deposits within spindle cell stroma
- Sheets of basaloid cells with peripheral palisading
Correct answer: Multinucleated giant cells in a fibrous connective tissue stroma
CGCG shows numerous osteoclast-like multinucleated giant cells dispersed within a vascular fibrous stroma, often with hemosiderin deposits.
Question 4: Fibrous dysplasia of the jaw characteristically demonstrates which radiographic appearance?
- Well-defined radiolucency with sclerotic border
- Ground-glass opacity with poorly defined borders blending into normal bone (Correct answer)
- Multiple radiolucent areas separated by dense septa ('soap bubble')
- Dense radiopaque mass with sun-ray pattern
Correct answer: Ground-glass opacity with poorly defined borders blending into normal bone
Fibrous dysplasia shows a classic 'ground-glass' or 'orange peel' radiodensity with ill-defined borders that blend imperceptibly into surrounding normal bone.
Question 5: Ranula is a mucous retention/extravasation lesion arising from which gland?
- Parotid gland
- Submandibular gland
- Sublingual gland (Correct answer)
- Minor salivary glands of the palate
Correct answer: Sublingual gland
Ranula is a mucocele of the floor of the mouth arising from the sublingual gland or its ducts, and can extend into the neck as a plunging ranula.
Question 6: The term 'torus mandibularis' refers to:
- An exostosis on the hard palate midline
- A benign bony exostosis on the lingual aspect of the mandible in the premolar region (Correct answer)
- A reactive bone growth on the buccal alveolar ridge
- An osteoma of the mandibular condyle
Correct answer: A benign bony exostosis on the lingual aspect of the mandible in the premolar region
Torus mandibularis is a benign developmental exostosis located on the lingual surface of the mandible, typically in the premolar region, and is bilateral in most cases.
DDS Oral Pathology and Oral Medicine 2
Squamous cell carcinoma of the oral cavity has the highest incidence in which site?