RB1 and neoplasm: Nevertheless, when comparing to TCGA sporadic tumours, the following copy number losses or regions of LOH appeared to be specific to ATM-associated tumours: 13q14.11-q14.3 (LHFP, FOXO1, LCP1, RB1), 21p11.2-p11.1 (TPTE, TEKT4P2, MIR3648-1, MIR3648-2, MIR3687-1, MIR3687-2) and 22q11.23 (GSTT1, GSTTP1, GSTTP2).