Case report: anti-IgLON5 disease combined with paraneoplastic cerebellar degeneration with the detection of anti-sulfatide IgG antibody, masquerading as meningoencephalitis

Whereas sleep disturbance is the most common feature in patients with anti-IgLON5 disease, our case presented with walking unsteadily and logagnosia. Anti-IgLON5 disease combined with PCD with the detection of anti-Sulfatide IgG antibody, masquerading as meningoencephalitis is very rare. Therefore, if meningoencephalitis did not recover with conventional treatment, anti-IgLON5 disease and PCD should be considered as the differential diagnosis.