Peripheral small fiber dysfunction and neuropathic pain in patients with Morvan syndrome

Morvan syndrome (MoS) is an autoimmune-mediated syndrome that is frequently associated with malignant thymoma and autoantibodies targeting contactin associated protein-like 2 (CASPR2-Abs). Neuropathic pain is a frequent clinical feature in MoS—encountered in 62% of patients—but the pain mechanisms are unknown. We studied 4 patients with MoS who had neuropathic pain and investigated whether this pain could be due to a selective involvement of small nerve fibers. Written consent was obtained from all patients, and the study was approved by the institutional review board of the University Claude Bernard Lyon 

Neeurology 2015