We performed MLPA on 327 primary T-ALL patient samples to detect deletions of 6q15 using probes directed against MAP3K7 and CASP8AP2. All patients had been treated in the ALL-BFM 2000 or in the AIEOP-BFM ALL 2009 studies and clinical data were available (Table 1). The gene discussed is CASP8AP2; the disease is acute lymphoblastic leukemia.