CANOMAD – eine seltene immunvermittelte Neuropathie
摘要
We present the case of a 46-year-old woman with a 2-year history of a chronic ataxic neuropathy characterized by progressive sensory deficits, gait ataxia, and ultimately ophthalmoplegia. Diagnostic work-up revealed an immunoglobulin M (IgM) monoclonal gammopathy and high titers of anti-GD2-IgM antibodies, leading to the diagnosis of CANOMAD syndrome (chronic ataxic neuropathy with ophthalmoplegia, monoclonal gammopathy, cold agglutinins, and disialosyl antibodies). Initial therapy with intravenous immunoglobulin (IVIG) resulted in transient improvement of ataxia and muscle strength, but the effect waned within weeks. Subsequent switch to subcutaneous immunoglobulin was unsuccessful in maintaining clinical stability. The patient’s condition was eventually stabilized with a combination of B‑cell depleting therapy (rituximab) and periodic IVIG during relapses. This case highlights the key points in CANOMAD management—from first presentation through evolving symptoms and delayed diagnosis to therapeutic challenges and current evidence-based strategies. Timely immunotherapy can improve neurological outcomes and prevent irreversible disability.