Navigating the Complexity of Stiff Person Syndrome: A Case Report and Literature Review.

Stiff person spectrum disorder is a disease that involves a host of conditions that are associated with glutamic acid decarboxylase 65-kilodalton isoform autoantibodies. These conditions may include diabetes mellitus type 1, pernicious anemia, autoimmune leukoencephalopathy, cerebellar ataxia, and stiff-person syndrome. Clinical recognition and diagnosis of stiff person spectrum disorder are important early, as immunologic treatment options showing reliable efficacy in slowing disease progression are available. This case presents a wide constellation of symptoms in which we describe the pathophysiology, clinical diagnosis, and current as well as future treatment options that may be available. .