Lewis-Sumner syndrome (LSS, synonymous multifocal acquired demyelinating sensory and motor neuropathy, MADSAM) is a dysimmune peripheral neuropathy responding to corticosteroids and intravenous immunoglobulins (IVIG) in the majority of patients. We report on the long term treatment (37 and 46months respectively) of two LSS patients, who had initially responded to IVIG, with subcutaneous immunoglobulins (SCIg). Both were switched to SCIg since stabilization by IVIG could only be achieved with short treatment intervals, and one of them also suffered from recurrent transient ischemic attacks (TIAs) following IVIG related increased blood viscosity. Long-term use of SCIg was safe and well tolerated. Both patients were clinically stable with only mild to moderate fluctuations requiring SCIg dosage adaptions. No further ischemic events occurred, when the patient was switched to SCIg.
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