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  • Title: Brain radial enhancement pattern in patients with negative glial fibrillary acidic protein-IgG: A cases series study.
    Author: Yue J, Lin P, Lian C, Yao H, Jiang L, Liao S, Xu L, Zhang J, Tan J, Chen Z, Yang J, Gao C, Huang L, Yang X, Long Y.
    Journal: J Neurol Sci; 2023 Oct 15; 453():120782. PubMed ID: 37683309.
    Abstract:
    BACKGROUND AND OBJECTIVES: Brain radial enhancement pattern on magnetic resonance imaging (MRI) has been identified as typical lesions in autoimmune glial fibrillary acidic protein astrocytopathy (GFAP-A). However, the authors encountered several patients without GFAP-IgG showing that such specific imaging. In the present study, we reported the clinical pictures of 5 GFAP-IgG-negative patients with GFAP-A specific imaging pattern. METHODS: Data was retrospectively obtained from June 2013 through April 2023, and five GFAP-IgG-negative patients with valid data were recruited. Clinical information was either obtained by the investigators or retrieved from the referring clinicians and included prodromal symptoms, neurologic manifestations, comorbidities, results of ancillary studies. RESULTS: Altogether five GFAP-IgG-negative patients with "meningoencephalitis/encephalitis" manifestations and brain radial perivascular enhancement were confirmed. One patient had peripheral lymphoma. Four patients had other autoimmune antibody in serum and/or cerebrospinal fluid, of which one patient had positive aquaporin IgG. Clinical features of the five patients included headache, fever, epilepsy and abnormal behavioral symptoms. MRI of patients revealed radial perivascular gadolinium enhancement extending from the lateral ventricles to the white matter suggestive of autoimmune GFAP-A. CONCLUSION: GFAP-A-like disorders with radial perivascular enhancement could be found in GFAP-IgG-negative patients with or without neoplasm, which could provide new insight into the differential diagnosis of GFAP-A.
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