FAT1 and acute lymphoblastic leukemia: In the n = 264 samples from pediatric and young adult T-ALL patients (reported by Liu et al.30) we found FAT1 positivity (FAT1pos) in 53% of cortical T-ALL (p < 0.0001; Supplementary Fig. 2a) and 44% of post-cortical T-ALL (p = 0.01; Supplementary Fig. 2a) compared to only 17% positivity in pre-cortical T-ALL samples.