By searching GenBank, we identified PAC RP1-18D14 which contains SIL, TAL-1 and 633-DNA, confirming this novel rearrangement as a new deletion of the SIL/TAL-1 locus..     ///     Deletions involving the SIL-TAL-1 locus are seen in 15% of T-acute lymphoblastic leukaemias (T-ALL).     ///    Molecular characterization of a new recombination of the SIL/TAL-1 locus in a child with T-cell acute lymphoblastic leukaemia.. 