MLL-PTD of exon 2 to exon 6 and exon 2 to exon 8 was revealed using Southern blotting, fluorescence in situ hybridisation, and reverse transcription polymerase chain reaction/DNA sequencing.     ///    This is the first report of an in vivo animal model exhibiting the systemic involvement of childhood AML containing MLL-PTD.     ///    "The prognostic impact and contribution to leukaemogenesis of MLL-PTD, especially in childhood cases, remain unknown. "    ///    We have established a novel cell line containing MLL-PTD derived from an 11-year-old patient with AML and designated as KOPM-88. 