PMID- 7647011 OWN - NLM STAT- MEDLINE DCOM- 19950925 LR - 20190705 IS - 0007-1048 (Print) IS - 0007-1048 (Linking) VI - 90 IP - 3 DP - 1995 Jul TI - Monoclonal gammopathy of undetermined significance: chromosome changes are a common finding within bone marrow plasma cells. PG - 693-6 AB - We used two indirect approaches [image analysis (Feulgen staining) and fluorescence in situ hybridization (FISH)] to study bone marrow plasma cells (BMPC) in 28 patients fulfilling criteria for MGUS. 61% of patients were found to be aneuploid after image analysis: three were hypodiploid and 14 were hyperdiploid. 12/14 hyperdiploid patients also revealed abnormalities after FISH: 12-72% of BMPC exhibited trisomy for at least one of chromosomes 3, 7, 9 and 11. These latter chromosomes are the four chromosomes most frequently implicated (in the shape of trisomy) in MM, confirming the tight relationship between both conditions. After a median follow-up of 19 months (12-41 months) no patient developed overt MM. Also, we failed to find any relationship between currently available biological parameters and DNA findings. As literature data give a transformation rate of 20-30% after a follow-up of 20-35 years, it is worth presuming that some aneuploid patients will evolve to MM, whereas others (also with aneuploid bone marrow plasma cells) will never develop cancer. Our findings indicate that numeric abnormalities, as they are shared both by MGUS and MM patients, are certainly an additional or a prerequisite event, but are not related to an overt disease. They also emphasize the importance of cytogenetic study in the pathophysiology of MGUS. FAU - Zandecki, M AU - Zandecki M AD - Laboratoire d'Hematologie, Hopital Calmette, Lille, France. FAU - Obein, V AU - Obein V FAU - Bernardi, F AU - Bernardi F FAU - Soenen, V AU - Soenen V FAU - Flactif, M AU - Flactif M FAU - Lai, J L AU - Lai JL FAU - Francois, M AU - Francois M FAU - Facon, T AU - Facon T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 SB - IM MH - Adult MH - Aged MH - *Aneuploidy MH - Bone Marrow/*ultrastructure MH - Chromosomes, Human, Pair 11 MH - Chromosomes, Human, Pair 3 MH - Chromosomes, Human, Pair 7 MH - Chromosomes, Human, Pair 9 MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase MH - Middle Aged MH - Paraproteinemias/*genetics MH - Plasma Cells/*ultrastructure MH - Trisomy EDAT- 1995/07/01 00:00 MHDA- 1995/07/01 00:01 CRDT- 1995/07/01 00:00 PHST- 1995/07/01 00:00 [pubmed] PHST- 1995/07/01 00:01 [medline] PHST- 1995/07/01 00:00 [entrez] AID - 10.1111/j.1365-2141.1995.tb05602.x [doi] PST - ppublish SO - Br J Haematol. 1995 Jul;90(3):693-6. doi: 10.1111/j.1365-2141.1995.tb05602.x.