Nerve conduction study of lower extremities in cutaneous arteritis patients with neurological manifestations.

Some patients originally diagnosed with cutaneous arteritis (CA) could develop additional disease manifestations, including peripheral neurological involvement. We evaluated the biological neurological parameters among CA patients who underwent nerve conduction studies for neurological involvement in the lower extremities. We reviewed 164 patients who were originally diagnosed with CA at our dermatology department between 2004 and 2015. Seventeen (10.4%) of the CA patients underwent further nerve conduction studies to determine their peripheral neurological manifestations, primarily in the lower extremities, in our neurology division. The frequency of low compound muscle action potential (CMAP) was significantly higher compared with that of delayed latency in both the peroneal nerve and sural nerve based on nerve conduction studies. The frequency of low CMAP was significantly higher compared with that of prolonged distal latency in both the peroneal and sural nerves. We suggest that impairment of the nerve axon pathways in the peroneal and sural nerves could result in the peripheral neurological manifestations in the lower extremities in CA patients.