CNTNAP2 and neuronal intranuclear inclusion disease: At the 9-month follow-up, serum CASPR2 antibodies were negative; however, a cranial MRI revealed new FLAIR hyperintensities at the corticomedullary junction, predominantly involving the frontal and parietal lobes, suggesting that the patient’s imaging findings were progressively evolving toward a typical NIID presentation (4) (Figure 1B[a–h]).