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Medicine

New Retroperitoneal Soft-Tissue Lesion in Multiple Myeloma.

Tingfei Gu, Zhao Chen, L. Kang

2026.2.12JAMA Oncology

DOI: 10.1001/jamaoncol.2025.6443

Abstract

A 67-year-old man with a history of λ light-chain multiple myeloma presents with increased serum-free λ light chain levels. What is your diagnosis?

Citation format

GU, Tingfei; CHEN, Zhao; KANG, L. New retroperitoneal soft-tissue lesion in multiple myeloma. JAMA Oncology, 2026, 12(4): 413.