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.