Use the distribution and tempo of symptoms to confirm a length-dependent process. Sensory ataxia and autonomic features strengthen the case for a peripheral neuropathy.

Length-dependent neuropathy starts distally and progresses proximally; Sensory loss is typically symmetric and stocking-glove; Distal weakness and autonomic skin changes often coexist; Sensory ataxia worsens when eyes are closed; The pattern strongly supports polyneuropathy