RESUMO
In neuromyelitis optica spectrum disorders (NMOSD), the clinical and long-term prognostic value of antinuclear antibodies (ANAs) is unclear. We analyzed registry data of NMO-IgG seropositive NMOSD patients (nâ¯=â¯74) according to ANA presence. The ANA-positive group (nâ¯=â¯32) demonstrated more frequent other autoantibodies (anti-SSA/Ro, anti-SSB/La, antiphospholipid, and anti-double stranded DNA antibodies) than did the ANA-negative group (nâ¯=â¯42). Clinically, annual relapse rates, and average lesion extents on MRI during attacks were comparable between the two groups (median follow-up of 7â¯years). The development of a poor outcome (walking with unilateral aid) also did not differ. In conclusion, although common, ANAs were not associated with a benign/malignant disease course in our NMOSD cohort.
Assuntos
Anticorpos Antinucleares/imunologia , Neuromielite Óptica/imunologia , Adulto , Anticorpos Antinucleares/sangue , Feminino , Humanos , Imunoglobulina G/sangue , Imunoglobulina G/imunologia , Masculino , Pessoa de Meia-Idade , Neuromielite Óptica/sangue , Neuromielite Óptica/patologia , PrognósticoRESUMO
INTRODUCTION: Polyneuropathy, organomegaly, endocrinopathy, M-protein, and skin changes (POEMS) syndrome and monoclonal gammopathy of undetermined significance (MGUS) are paraproteinemic disorders that can cause demyelinating polyneuropathy. Herein we assessed the findings of nerve conduction studies (NCS) in patients with POEMS syndrome and MGUS-related neuropathy to determine whether the NCS characteristics can help differentiate between these conditions. METHODS: We enrolled 24 POEMS and 37 MGUS-related neuropathy patients. NCS parameters, including compound muscle action potential (CMAP), motor conduction velocity (MCV), and terminal latency index (TLI), were evaluated. RESULTS: Compared with MGUS-related neuropathy patients, POEMS syndrome patients demonstrated a greater reduction in both the upper and lower limb CMAPs and a greater reduction in the median and ulnar MCVs. The TLIs were significantly higher in POEMS patients. DISCUSSION: NCS can help distinguish POEMS syndrome from MGUS-related neuropathy. Reduced CMAPs, slow MCVs, and high TLIs are indicative of POEMS syndrome rather than MGUS-related neuropathy. Muscle Nerve 56: E73-E77, 2017.
