We report the case of a 79-year-old female patient previously treated for multiple myeloma that was referred to our hospital due to a growing painless right arm tumor. Imaging and pathology results confirmed the diagnosis of extramedullary plasmacytoma. The patient underwent external beam radiotherapy with complete clinical response at follow-up.
Keywords: complete response; multiple myeloma; radiotherapy; soft‐tissue plasmacytoma.
© 2021 The Authors. Clinical Case Reports published by John Wiley & Sons Ltd.