Lichen planus commonly involves which mucosal surface with Wickham striae?

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Study for the Step 3 UWSA Exam with our challenging quiz. Prepare with detailed explanations for each question, ensuring you're well-equipped for success. Enhance your understanding and boost your exam confidence!

Multiple Choice

Lichen planus commonly involves which mucosal surface with Wickham striae?

Explanation:
Wickham striae are the fine, lace-like white lines most characteristic of lichen planus on mucous membranes, and they are classically seen on the oral mucosa. The buccal mucosa is the site most commonly involved, where the reticular network of white lines arises from the underlying histologic pattern of lichen planus (hyperkeratosis with a saw-tooth lymphocytic interface). This makes the oral mucosa the mucosal surface where Wickham striae are most readily recognized and most typically described in this condition. Other mucosal sites can be affected, but the prominent, diagnostic white striae point to the oral mucosa.

Wickham striae are the fine, lace-like white lines most characteristic of lichen planus on mucous membranes, and they are classically seen on the oral mucosa. The buccal mucosa is the site most commonly involved, where the reticular network of white lines arises from the underlying histologic pattern of lichen planus (hyperkeratosis with a saw-tooth lymphocytic interface). This makes the oral mucosa the mucosal surface where Wickham striae are most readily recognized and most typically described in this condition. Other mucosal sites can be affected, but the prominent, diagnostic white striae point to the oral mucosa.

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