Blood tests including alpha‐fetoprotein, albumin, cholesterol, lactate/pyruvate, and cytosine‐thymine‐guanine repeats in spinocerebellar ataxia 1, 2, 3, and dentatorubral pallidoluysian atrophy disclosed no abnormalities in both patients. Here, AFP is linked to Dentatorubral pallidoluysian atrophy.