Case report: orthostatic hypotension as the first presentation of progressive encephalomyelitis with rigidity and myoclonus (PERM) with multiple autoimmune antibodies
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Introduction: Stiff person syndrome (SPS) is a rare disease characterized by axial and lower-extremity muscle rigidity, muscle spasm, and pain. Progressive encephalomyelitis with rigidity and myoclonus (PERM) is a variant of SPS.... ...
