For patient 6, CBA and aCGH had identified several structural events on chromosome 6 including an interstitial deletion (q14.1q15) previously described for driving T-cell leukemia progression (36), together with the recurrent deletion on chromosome 9p21.3 (including CDKN2A/CDKN2B). This evidence concerns the gene CDKN2B and T-cell leukemia.