A member asked:

I have small fiber neuropathy most likely autoimmune my dr ordered free light chains blood test, what is this? does she think i have cancer? no expla

A doctor has provided 1 answer
Dr. Matthew Fero answered

Specializes in Medical Oncology

Free light chains: ... (FLC) is a sensitive test for a group of disorders involving abnormal plasma cells. These are the B lymphocytes which normally make our antibody proteins. An abnormal growth of a "clone" of these cells, whether benign or malignant, may increase the FLC or show a "monoclonal" peak on related immunological tests. Myeloma is the most severe form, but generally presents with other symptoms.

Answered 5/28/2016

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