Adverse cutaneous reaction to hydroxychloroquine in a patient with anti-SAE-1-positive dermatomyositis and a history of diffuse large B-cell lymphoma

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This case report details the cutaneous findings of a patient with a history of diffuse B-cell lymphoma and SAE-1–positive dermatomyositis who developed an adverse cutaneous reaction after initiation of treatment with hydroxychloroquine. This adds to the sparse literature available detailing the correlation between anti–SAE-1 autoantibodies in dermatomyositis and the unique adverse cutaneous reactions in patients taking hydroxychloroquine. Additionally, our patient developed dermatomyositis years after a diagnosis of lymphoma. This report highlights the utility of the myositis-specific antibody panel to guide diagnosis and management, as well as the potential for developing dermatomyositis years after a lymphoma diagnosis.