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Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is an uncommon subtype of peripheral neuropathy, especially in systemic lupus erythematosus (SLE). We report a case of SLE presenting with CIDP successfully treated. The patient presented with bilateral, progressive, ascending, sensory, and motor neuropathy. Electrodiagnostic tests reported active motor and sensitive demyelinating polyneuropathy, and the diagnosis of CIDP was confirmed according to the European Federation of Neurological Societies/Peripheral Nerve Society criteria. Initial management with intravenous immunoglobulin and high-dose steroids was administered, then 6-month intravenous cyclophosphamide was initiated with improvement according to clinical scales. In conclusion, CIDP in SLE is rare, reported in just 0.2%. Immunosuppressive therapy should be considered whether initial improvement is not evidenced, as seen in our case requiring cyclophosphamide; interestingly, systemic activity was in remission as the peripheral nervous system is not part of neurological compromise, and we suggest evaluating this unusual presentation into rheumatological practice.

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