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Christy M. Williams, MD; Kirsten S. W. Bellucci, MD; Vincent Liu, MD; Paul Levins, MD
Harvard Medical School and Massachusetts General Hospital, Boston, Mass

Arch Dermatol. 2006;142:1501-1506.

	Since this article does not have an abstract, we have provided the first 149 words of the full text and any section headings.

REPORT OF A CASE

A 72-year-old man presented with a 7-day history of an erythematous, mildly pruritic, papular rash over his right upper back area. More papules had developed on the flexor surface of his forearm and on his abdomen a few days after the initial eruption. He denied fever, chills, and difficulty breathing. The pruritus resolved within 24 hours. He did report a biting sensation and, while scratching, discovered a green and yellow caterpillar.

Physical examination revealed several 2- to 4-mm erythematous papules with some excoriations and a few papules with a necrotic center over the right upper back area (Figure 1). A punch biopsy specimen obtained from the rash on the back was sent for histologic examination (Figure 2 and Figure 3).

Figure appears in full text version. Figure 1.

Figure appears in full text version. Figure 2.

Figure appears in full text version. Figure 3.

What is your diagnosis?

SECTION EDITOR: MICHAEL E. MING, MD

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Erythematous Papular Rash on the Upper Back Area—Diagnosis
Arch Dermatol. 2006;142(11):1501-1506.
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