류마티스관절염 환자에서 피부 병변을 주소로 내원하여 다발성 골수종을 진단한 경험을 하였기에 문헌고찰과 함께 보고하는 바이다.
Paraneoplastic vasculitis is a part of secondary vasculitis, the hematological neoplasm, such as lymphoma or myelodysplastic syndrome, which is most frequently observed. However, in multiple myeloma, cutaneous vasculitis is a rare complication, particularly as an initial clinical symptom. We report one case where a purplish reticulated patch on the lower extremity and an ear lobe skin necrotic change developed in a rheumatoid arthritis patient. He was diagnosed with multiple myeloma and cutaneous vasculitis.