PMID- 12617866 OWN - NLM STAT- MEDLINE DCOM- 20031120 LR - 20191106 IS - 1521-6926 (Print) IS - 1521-6926 (Linking) VI - 15 IP - 4 DP - 2002 Dec TI - Acute lymphoblastic leukaemia: diagnosis and classification. PG - 597-621 AB - Acute lymphoblastic leukaemia (ALL) is a heterogeneous disease with distinct biological and prognostic groupings. Diagnosis relies on traditional cytomorphological and immunohistochemical evaluation of the leukaemic blasts. Subsequently, cytogenetic analysis identifies clonal numeric and/or structural chromosomal abnormalities that may be present, thus confirming the subtype classification and providing important prognostic information for treatment planning. The major chromosomal abnormalities in ALL are t(9;22)(q34;q11), t(12;21)(p13;q22), t(4;11)(q21;q23), t(1;19)(q23;p13), 8q24 translocations and hyperdiploidy. Generally, hyperdiploidy, occurring most frequently in paediatric cases, is associated with a good prognosis, while hypodiploidy confers a poor prognosis. Among structural chromosomal abnormalities, the t(9;22)(q34;q11) resulting in the BCR/ABL fusion protein, and rearrangements of the MLL gene, confer a poor prognosis in both children and adults, while t(12;21)(p13;q22), resulting in the TEL/AML1 fusion protein, and del (12p) confer a good prognosis. More recently, additional diagnostic and prognostic information has been gained from fluorescence in situ hybridization (FISH) and DNA microarray techniques. FAU - Kebriaei, Partow AU - Kebriaei P AD - Section of Hematology/Oncology, Department of Medicine and Cancer Research Center, University of Chicago, Chicago, Illinois 60637, USA. FAU - Anastasi, John AU - Anastasi J FAU - Larson, Richard A AU - Larson RA LA - eng PT - Journal Article PT - Review PL - Netherlands TA - Best Pract Res Clin Haematol JT - Best practice & research. Clinical haematology JID - 101120659 SB - IM MH - Cell Lineage/genetics MH - Chromosome Aberrations MH - Cytological Techniques/methods MH - Genes, Tumor Suppressor MH - Humans MH - Immunophenotyping MH - Oligonucleotide Array Sequence Analysis MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/*classification/*diagnosis/genetics/pathology MH - Prognosis RF - 107 EDAT- 2003/03/06 04:00 MHDA- 2003/12/03 05:00 CRDT- 2003/03/06 04:00 PHST- 2003/03/06 04:00 [pubmed] PHST- 2003/12/03 05:00 [medline] PHST- 2003/03/06 04:00 [entrez] AID - S1521692602902240 [pii] AID - 10.1053/beha.2002.0224 [doi] PST - ppublish SO - Best Pract Res Clin Haematol. 2002 Dec;15(4):597-621. doi: 10.1053/beha.2002.0224.