Truncating NF1 mutations in pediatric T-ALL and AML. (A) Sequence analysis of patient no. 4389 (AML) showing a c.2849_2850insTT mutation in the remaining NF1 allele. (B) Sequence analysis of patient no. 2736 (T-ALL) showing a c.3734delCinsGGTTTATGGTTT mutation in the remaining NF1 allele. (C) Sequence analysis of patient no. 2780 (T-ALL) showing a c.333dupA mutation in the remaining NF1 allele.