CD40LG and POEMS syndrome: Note: Before concluding that ultrasound or MRI abnormalities support CIDP, there should be no laboratory or clinical features suggesting other diseases, such as MMN, demyelinating CMT, IgM paraproteinemic neuropathy (especially with anti-MAG antibodies), POEMS syndrome, diabetic radiculoplexus neuropathy, amyloid neuropathy, neuralgic amyotrophy, leprosy, neurofibromatosis, or neurolymphomatosis [3].