Next, as for MSA-mimicking diseases, also focusing on those with two or more reported patients, anti-contactin-associated protein 2 (Caspr2) (two patients) [65], anti-CV2/CRMP5 (two patients) [66,67], and anti-Homer-3 antibodies (two patients) [68] were identified. The gene discussed is CNTNAP2; the disease is multiple system atrophy.