PMID- 10989646 OWN - NLM STAT- MEDLINE DCOM- 20000928 LR - 20190513 IS - 0002-9173 (Print) IS - 0002-9173 (Linking) VI - 114 IP - 3 DP - 2000 Sep TI - The relationship between typical and atypical B-cell chronic lymphocytic leukemia. A comparative genomic hybridization-based study. PG - 448-58 AB - B-cell chronic lymphocytic leukemia (CLL) can be classified as typical or atypical based on morphologic and immunophenotypic features. The relationship between these 2 groups is uncertain, and there is some evidence they may be different entities. We used comparative genomic hybridization (CGH) to explore the cytogenetic relationship between typical and atypical B-cell CLL. Results showed a similar pattern of chromosome gains and losses detected in typical and atypical B-cell CLL, suggesting they are related disorders. Gain on chromosome 12 material occurred in cases that were apparently normal by interphase fluorescence in situ hybridization (FISH). The common region mapped to chromosome 12q21. Gains on chromosome 4 were present in 74% (32) of cases analyzed and were confirmed by interphase FISH in 30% (13) of cases. We previously have shown the strong association between trisomy 12 as detected by FISH and CD11a expression in atypical B-cell CLL. In the present study, CGH demonstrated additional gains on 12p and 12q outside the common amplified region of 12q21 in these patients. FAU - O'Connor, S J AU - O'Connor SJ AD - Haematological Malignancy Diagnostic Service, General Infirmary at Leeds, England. FAU - Su'ut, L AU - Su'ut L FAU - Morgan, G J AU - Morgan GJ FAU - Jack, A S AU - Jack AS LA - eng PT - Journal Article PL - England TA - Am J Clin Pathol JT - American journal of clinical pathology JID - 0370470 RN - 0 (DNA, Neoplasm) SB - IM MH - Aged MH - Aged, 80 and over MH - Chromosome Aberrations MH - Chromosomes, Human, Pair 12 MH - Chromosomes, Human, Pair 4 MH - DNA, Neoplasm/*analysis MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Leukemia, Lymphocytic, Chronic, B-Cell/*genetics/*pathology MH - Male MH - Middle Aged MH - Nucleic Acid Hybridization MH - Trisomy EDAT- 2000/09/16 11:00 MHDA- 2000/09/30 11:01 CRDT- 2000/09/16 11:00 PHST- 2000/09/16 11:00 [pubmed] PHST- 2000/09/30 11:01 [medline] PHST- 2000/09/16 11:00 [entrez] AID - 10.1093/ajcp/114.3.448 [doi] PST - ppublish SO - Am J Clin Pathol. 2000 Sep;114(3):448-58. doi: 10.1093/ajcp/114.3.448.