PMID- 23368088 OWN - NLM STAT- MEDLINE DCOM- 20130521 LR - 20130318 IS - 1365-2141 (Electronic) IS - 0007-1048 (Linking) VI - 161 IP - 1 DP - 2013 Apr TI - Cytogenetics of extramedullary manifestations in multiple myeloma. PG - 87-94 LID - 10.1111/bjh.12223 [doi] AB - Extramedullary disease in patients with multiple myeloma is a rare event, occurring mostly in advanced disease or relapse. Outcome is poor and prognostic factors predicting the development of extramedullary disease have not been defined. We investigated cytogenetic alterations of myeloma cells in different extramedullary manifestations by adapting the fluorescence in situ hybridization (FISH) technique in combination with cytoplasmic immunoglobulin staining to study the cytogenetics of plasma cell tumours on paraffin embedded material. Thirty six patients were investigated: 19 with extramedullary disease, 11 with skeletal extramedullary disease and six with solitary extramedullary plasmacytoma. The first two groups showed the following results: del(17p13) 32% vs. 27%, del(13q14) 35% vs. 27%, MYC-overrepresentation 28% vs. 18% and t(4;14) 37% vs. 18%. We detected an overall higher incidence of del(17p13) in both groups compared to data from bone marrow samples of multiple myeloma reported to date (range 7-16%). The solitary extramedullary plasmacytomas presented overall less cytogenetic aberrations than the other groups. Most important, three patients with extramedullary disease and one with skeletal extramedullary disease presented different FISH findings in the extramedullary tumour compared to their bone marrow plasma cells. del(17p13), occurring additional in three of four cases, seems a strong marker for extramedullary progression of myeloma. CI - (c) 2013 Blackwell Publishing Ltd. FAU - Billecke, Lisa AU - Billecke L AD - Department of Oncology, Haematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Cancer Centre, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany. FAU - Murga Penas, Eva M AU - Murga Penas EM FAU - May, Annette M AU - May AM FAU - Engelhardt, Monika AU - Engelhardt M FAU - Nagler, Arnon AU - Nagler A FAU - Leiba, Merav AU - Leiba M FAU - Schiby, Ginette AU - Schiby G FAU - Kroger, Nicolaus AU - Kroger N FAU - Zustin, Jozef AU - Zustin J FAU - Marx, Andreas AU - Marx A FAU - Matschke, Jakob AU - Matschke J FAU - Tiemann, Markus AU - Tiemann M FAU - Goekkurt, Eray AU - Goekkurt E FAU - Heidtmann, Hans-Heinrich AU - Heidtmann HH FAU - Vettorazzi, Eik AU - Vettorazzi E FAU - Dierlamm, Judith AU - Dierlamm J FAU - Bokemeyer, Carsten AU - Bokemeyer C FAU - Schilling, Georgia AU - Schilling G LA - eng PT - Journal Article PT - Multicenter Study DEP - 20130201 PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - *Chromosome Aberrations MH - Chromosome Deletion MH - Chromosomes, Human, Pair 17/genetics MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Multiple Myeloma/*genetics/pathology/therapy MH - Plasmacytoma/genetics/pathology MH - Retrospective Studies MH - Young Adult EDAT- 2013/02/02 06:00 MHDA- 2013/05/23 06:00 CRDT- 2013/02/02 06:00 PHST- 2012/10/13 00:00 [received] PHST- 2012/12/17 00:00 [accepted] PHST- 2013/02/02 06:00 [entrez] PHST- 2013/02/02 06:00 [pubmed] PHST- 2013/05/23 06:00 [medline] AID - 10.1111/bjh.12223 [doi] PST - ppublish SO - Br J Haematol. 2013 Apr;161(1):87-94. doi: 10.1111/bjh.12223. Epub 2013 Feb 1.