Cervical Nerve Root Neurolymphomatosis Detected on F-18 FDG PET/CT

Abstract

A 65-year-old woman was treated with chemotherapy for diffuse large B-cell lymphoma (DLBCL) after presenting with sharp pain of the left arm. She had complete remission of the DLBCL, and symptoms disappeared. One year after treatment, she developed sharp pain in the first through third fingers that extended to the left arm. F-18 FDG PET/CT showed linear increased FDG uptake along the cervical nerve roots and plexus at the C4–C7 levels, suggesting neurolymphomatosis. Gadolinium-enhanced M RI showed enhancement and enlargement of the cervical nerve root and plexus. Fine needle aspiration biopsy of the left cervical nerve confirmed DLBCL.