PMID- 15044915 OWN - NLM STAT- MEDLINE DCOM- 20041102 LR - 20230210 IS - 0893-3952 (Print) IS - 0893-3952 (Linking) VI - 17 IP - 5 DP - 2004 May TI - Cytogenetic and molecular cytogenetic findings in 43 aneurysmal bone cysts: aberrations of 17p mapped to 17p13.2 by fluorescence in situ hybridization. PG - 518-25 AB - Aneurysmal bone cyst is a benign, cystic lesion of bone composed of blood-filled spaces separated by fibrous septa. Relatively few cases of aneurysmal bone cyst have been cytogenetically characterized, yet abnormalities of the short arm of chromosome 17 appear to be recurrent. In this study, conventional cytogenetic analysis of 43 aneurysmal bone cyst specimens from 38 patients over a 12-year period revealed clonal chromosomal abnormalities in 12 specimens. Karyotypic anomalies of 17p, including a complex translocation and inversion, were identified in eight of these 12 specimens. In an effort to further define the aberrant 17p breakpoint, fluorescence in situ hybridization (FISH) analyses were performed using a series of probe combinations spanning a 5.1 Mb region between the TP53 (17p13.1) and Miller-Dieker lissencephaly syndrome (17p13.3) gene loci. These studies revealed the critical breakpoint locus at 17p13.2, flanked proximally by an RP11-46I8, RP11-333E1, and RP11-457I18 bacterial artificial chromosome (BAC) probe cocktail and distally by an RP11-198F11 and RP11-115H24 BAC and RP5-1050D4 P1 artificial chromosome (PAC) probe cocktail. Overall, abnormalities of the 17p13.2 locus were identified by metaphase and/or interphase cell FISH analysis in 22 of 35 (63%) aneurysmal bone cyst specimens examined including 26 karyotypically normal specimens. These cytogenetic and molecular cytogenetic findings expand our knowledge of chromosomal alterations in aneurysmal bone cyst, further localize the critically involved 17p breakpoint, and provide an alternative approach (ie FISH) for detecting 17p abnormalities in nondividing cells of aneurysmal bone cysts. The latter could potentially be utilized as an adjunct in diagnostically challenging cases. FAU - Althof, Pamela A AU - Althof PA AD - Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198-3135, USA. FAU - Ohmori, Kazuo AU - Ohmori K FAU - Zhou, Ming AU - Zhou M FAU - Bailey, Jacqueline M AU - Bailey JM FAU - Bridge, R Stuart AU - Bridge RS FAU - Nelson, Marilu AU - Nelson M FAU - Neff, James R AU - Neff JR FAU - Bridge, Julia A AU - Bridge JA LA - eng GR - P30 CA 36727/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mod Pathol JT - Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc JID - 8806605 SB - IM MH - Adult MH - Bone Cysts, Aneurysmal/*genetics/pathology MH - Child MH - Child, Preschool MH - *Chromosome Aberrations MH - Chromosome Banding MH - Chromosome Inversion MH - Chromosome Mapping MH - Chromosomes, Human, Pair 17/*genetics MH - Chromosomes, Human, Pair 6/genetics MH - Cytogenetic Analysis MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Male MH - Translocation, Genetic EDAT- 2004/03/27 05:00 MHDA- 2004/11/04 09:00 CRDT- 2004/03/27 05:00 PHST- 2004/03/27 05:00 [pubmed] PHST- 2004/11/04 09:00 [medline] PHST- 2004/03/27 05:00 [entrez] AID - S0893-3952(22)04373-3 [pii] AID - 10.1038/modpathol.3800090 [doi] PST - ppublish SO - Mod Pathol. 2004 May;17(5):518-25. doi: 10.1038/modpathol.3800090.