11C-Methionine-Avid Plasmablastic Lymphoma.

A 73-year-old woman had a diagnosis of a plasmablastic lymphoma by the excision of the right parotid gland. Two years after the diagnosis, the patient underwent a whole-body C-methionine PET/CT in order to evaluate the amino acid avidity of a scalp metastasis and for plasmablastic lymphoma restaging. C-methionine uptake was detected in the scalp, in several bone sites, and in the cricoid cartilage. Plasmablastic lymphoma is a subtype of B-cell lymphoma with an aggressive behavior and a poor prognosis. C-methionine appears to be a promising tracer for paraprotein-producing neoplasms.