Baseline Hb (8.7 ± 1.3 vs. 12.9 ± 1.3 g/dL, P < 0.001) and total WBC count (9.6 ± 3.3 vs. 6.0 ± 1.9 × 103, P < 0.001) were significantly lower and higher, respectively, in subjects with SCA when compared with controls. The gene discussed is GSTM1; the disease is autosomal dominant cerebellar ataxia.