Neurosyphilis complicated by anti-γ-aminobutyric acid-B receptor encephalitis: A case report

Figure 1 Tissue-based assay and γ-aminobutyric acid-B receptor titer before and after treatment. A and B: Tissue-based assay (TBA)-negative case example; C and D: TBA-positive on admission; E and F: TBA positive after three months; G: Anti-γ-aminobutyric acid-B receptor (GABA_BR)-negative case example; H: Cerebrospinal fluid (CSF)-GABA_BR positive on admission (1:3.2); I: Serum-GABA_BR positive on admission (1:100); J: Serum-GABA_BR positive after two weeks (1:32); K: CSF-GABA_BR positive after three months (1:10); L: Serum-GABA_BR positive after three months (1:100). TBA: Tissue-based assay; CBA: Cell-based assay.

Figure 2 Brain magnetic resonance imaging scan on admission and after three months. A and E: T2 fluid-attenuated inversion recovery (FLAIR) image shows the high signal of the left amygdala; B and F: T2 FLAIR image shows the high signal of the right thalamus; C and G: T2 FLAIR image shows the high signal of the corpus callosum; D and H: T2 FLAIR image shows the high signal in the white matter surrounding the posterior part of the lateral ventricular body.