CD40LG and chronic inflammatory demyelinating polyradiculoneuropathy: Another group of disorders are the paraproteinemic neuropathies, which may or may not be related to underlying hematological malignancy, and are associated with a relative risk of 5.9% (95%CI: 1.2–28.4) of developing CIDP.65All patients with slowed CV and suspected acquired neuropathy need to be investigated for paraproteinemic neuropathy.47Both immunoglobulin M (IgM) and non-IgM paraproteins can mimic CIDP.