[Neuropathic pain as a symptom in autonomic neuropathies and other rare diseases : Small fiber neuropathy: its recognition, diagnosis, and treatment].

Background: Neuropathic pain is difficult to diagnose and treat. Small fiber neuropathy (SFN) flies under the radar of nerve conduction studies.

Objectives: The importance of a structured patient history and physical examination in the context of neuropathic pain is emphasized.

Nonregional small fibre neuropathy in cases of autoimmune autonomic neuropathy.

Objective: Autonomic small fibre neuropathy is described in patients with autoimmune autonomic neuropathy (AAN). Few data are available on somatosensory function and skin biopsies in AAN.

Methods: Retrospective analysis of 17 patients (51.