[Seronegative myasthenia gravis].

Abstract excerpt

Six to 20 p.cent of patients with generalized myasthenia gravis and 30 to 50 p.cent of those with ocular myasthenia gravis do not have anti AchR antibodies. Strict clinical, pharmacological and electrophysiological criteria are needed for the diagnosis of sero-negative myasthenia gravis. Sero-negative myasthenia gravis is an autoimmune disorder. But thymic hyperplasia is generally absent. Antibodies directed...

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