Dental OSCE (Objective Structured Clinical Examination) Practice Exam

What is a characteristic appearance of lichen planus lesions?

1. Red flat lesions

2. White lesions on the cheeks

3. Blistering lesions

4. Crusty lesions on the lips

The correct answer is: White lesions on the cheeks

Lichen planus is characterized by the presence of distinctive white lesions, often described as lacy or reticular, particularly on the mucosal surfaces of the cheeks. These lesions are typically asymptomatic and can vary in appearance from mildly elevated, white strands to more pronounced plaques. The presence of Wickham's striae—fine white lines that can be seen on the surface of these lesions—is a key feature that helps in the diagnosis of lichen planus. The appearance of lichen planus lesions is a critical aspect to understand, as it aids in differentiating it from other conditions that may present in similar ways. For instance, the lesions' specific coloration and texture assist clinicians in identifying them correctly, which is essential for determining the appropriate treatment and management strategies.