Use symptoms, exam findings, and targeted electrodiagnostics when CIDP is suspected. A normal routine study does not exclude a sensory or proximal CIDP variant.

CIDP requires demyelination in at least two nerves; Pure sensory CIDP accounts for a minority of cases; Routine nerve conduction can be normal in sensory CIDP; Pathology may localize proximally near the dorsal root ganglion; Proximal disease can be missed by standard distal testing