Figure 3. Subacute cutaneous lupus erythematosus. Typical features include symmetric, widespread, superficial, and nonscarring lesions. Involvement of the neck, shoulders, upper chest, upper back, and extensor surface of the hand is common. These lesions begin as small photosensitive, erythematous, scaly papules or plaques that evolve into a papulosquamous (psoriasiform) (left) or annular polycyclic form (right). Subacute cutaneous lupus erythematosus has been associated with the presence of anti-Ro/SS-A antibodies, genetic deficiencies of complement C2 and C4, and certain medications, such as hydrochlorothiazide [1]. (Courtesy of Dr. Maria Turner.).

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