Quiz # 61 Answer Spot The Diagnosis

B. Cutaneous lupus

(Quiz # 61 Question is published in this issue on page 35)

Discussion

A skin biopsy confirmed the diagnosis of cutaneous lupus, D; subsequent blood test results, including an antinuclear antibody assay, were normal. Rosacea commonly involves the central face but is in the differential. Seborrheic and contact dermatitides typically show more scaling and are not tender. Photodermatitis usually occurs following use of a systemic or a topical agent; this patient had no such history.

The best management option for this patient is a sunscreen that blocks the UV-A spectrum, which aggravates cutaneous lupus.