Abstract
Systemic anaplastic large cell lymphoma (sALCL) is a rare, malignant T-cell lymphoma characterized by CD30 expression. There are 2 subtypes: ALK-positive sALCL and ALK-negative sALCL. In either condition, extranodal involvement is uncommon and secondary dissemination to the skin only occurs in about 20% of patients. We report a unique case in a 75-year-old woman who presented with multiple crops of pruritic papules in different stages of healing along her back for 3-4 weeks. Erythematous papules on her arms, as well as lymphadenopathy, were also present.
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