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Course: Annular Erythematous Plaques With Overlying Blisters in a Cluster of Jewels Pattern

CME Credits: 1.00

Released: 2024-01-24

A woman in her 80s presented with mildly pruritic skin lesions on her upper and lower extremities that had progressively appeared during the previous month. The patient had no systemic symptoms or unexplained weight loss. Physical examination revealed erythematous, nondesquamative, annular plaques, some of which had overlying vesicles in a cluster of jewels arrangement on the flexor aspect of both wrists and lower limbs (Figure 1). There was no mucosal involvement, and the Nikolsky sign test result was negative. Chest radiography results were normal and laboratory studies—complete blood cell count, kidney, and hepatic function; urinalysis; and indirect immunofluorescence—were unremarkable except for positive circulating IgG against desmoglein-1 antigen. A skin biopsy specimen was collected from a lesion on the anterior aspect of the left wrist for histopathologic and immunofluorescent analyses, and treatment with oral prednisone (30 mg/d) tapering for 1 month was initiated.


Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.


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