PMID- 11279311 OWN - NLM STAT- MEDLINE DCOM- 20010510 LR - 20171101 IS - 0001-5792 (Print) IS - 0001-5792 (Linking) VI - 104 IP - 4 DP - 2000 TI - Dup(12)(q13-q22) and 13q14 deletion in a case of B-cell chronic lymphocytic leukemia. PG - 197-201 AB - Cases with partial trisomy 12 have rarely been found in B-cell chronic lymphocytic leukemia (CLL). We report our clinical, cytogenetic and fluorescence in situ hybridization (FISH) findings in a CLL patient with a duplication of part of the long arm of chromosome 12 between bands q13-q22. This patient was the only case with this duplication among the 112 cases (0.9%) of CLL cytogenetically analyzed in our laboratory. FISH studies using unique-sequence specific probes for the RB-1 (retinoblastoma) gene and the D13S319 locus at the 13q14 band showed a monoallelic loss for the D13S319 locus (20% of cells) with a diploid RB-1 gene. Our case showed an atypical morphology (35% prolymphocytes), a high proliferation rate and progression of the disease, indicating that the duplication of this region may be equivalent to complete trisomy 12 in CLL patients. CI - Copyright 2001 S. Karger AG, Basel FAU - Chena, C AU - Chena C AD - Departamento de Genetica, Instituto de Investigaciones Hematologicas Mariano R. Castex, Academia Nacional de Medicina, Pacheco de Melo 3081, 1425-Buenos Aires, Argentina. FAU - Sarmiento, M AU - Sarmiento M FAU - Palacios, M F AU - Palacios MF FAU - Scolnik, M AU - Scolnik M FAU - Slavutsky, I AU - Slavutsky I LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Switzerland TA - Acta Haematol JT - Acta haematologica JID - 0141053 SB - IM MH - Aged MH - Alleles MH - Cell Division/genetics MH - Chromosomes, Human, Pair 12/*genetics MH - Chromosomes, Human, Pair 13/*genetics MH - Cytogenetic Analysis MH - Disease Progression MH - Female MH - *Gene Deletion MH - *Gene Duplication MH - Humans MH - Immunophenotyping MH - In Situ Hybridization, Fluorescence MH - Leukemia, Lymphocytic, Chronic, B-Cell/etiology/*genetics/pathology MH - Retinoblastoma/genetics MH - Trisomy EDAT- 2001/03/30 10:00 MHDA- 2001/05/22 10:01 CRDT- 2001/03/30 10:00 PHST- 2001/03/30 10:00 [pubmed] PHST- 2001/05/22 10:01 [medline] PHST- 2001/03/30 10:00 [entrez] AID - 46515 [pii] AID - 10.1159/000046515 [doi] PST - ppublish SO - Acta Haematol. 2000;104(4):197-201. doi: 10.1159/000046515.