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del(6q) in Multiple Myeloma

Written1998-09Christophe Brigaudeau
Laboratory of Hematology, University Hospital, 87000 Limoges, France

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ICD-Morpho 9732/3 Plasma cell myeloma / Multiple myeloma
Atlas_Id 2060

Clinics and Pathology

Disease multiple myeloma (MM) is a malignant plasma cell proliferation
Phenotype / cell stem origin mature differentiated B-cell, but also with CD56 expression, which is not found in normal plasma cell; CD38+, CD40+, CD138+.
Epidemiology MM' s annual incidence is 30/106; del(6q) is observed in about 2 to 5 % of MM cases (i.e. : 5-10 % of cases with an abnormal karyotype).
Clinics bone pain; susceptibility to infections; renal failure; neurologic dysfonctions
Pathology MM staging:
- stage I: low tumour cell mass; normal Hb; low serum calcium; no bone lesion; low monoclonal Ig rate;
- stage II: fitting neither stage I nor stage II;
- stage III: high tumour cell mass; low Hb and/or high serum calcium and/or advanced lytic bone lesions and/or high monoclonal Ig rate
Evolution MM can evolve towards plasma cell leukemia
Prognosis prognosis (highly variable) is according to the staging and other parameters, of which are now the karyotypic findings : two distinct cytogenetic pattern have been reported, according to the chromosome number : 1- a hyperdiploid pattern, and 2- a pattern of either pseudodiploidy,hypodiploidy or near-tetraploidy karyotypes; patients with the latter pattern appear to have a worse prognosis than patients with a hyperdiploid karyotype (med survival of 1.5 yr vs 3 yrs; p<0.04). Del(6q) abnormalities were more frequent in the second hypodiploid group.


Cytogenetics Morphological del(6q) are mainly so-called terminal deletions, with a variable breakpoint in q12, q15, q21, or q23; overall, the break occurs predominantly in 6q21.

Genes involved and Proteins

Note del(6q) in MM cases encompass the 6q21 band : loss of this band suggests that the critical gene(s) might be a recessive tumour suppressor gene sitting in 6q21, which remains to be identified


Cytogenetic study of 30 patients with multiple myeloma: comparison of 3 and 6 day bone marrow cultures stimulated or not with cytokines by using a miniaturized karyotypic method.
Brigaudeau C, Trimoreau F, Gachard N, Rouzier E, Jaccard A, Bordessoule D, Praloran V
British journal of haematology. 1997 ; 96 (3) : 594-600.
PMID 9054668
Cytogenetic analysis of 280 patients with multiple myeloma and related disorders: primary breakpoints and clinical correlations.
Calasanz MJ, Cigudosa JC, Odero MD, Ferreira C, Ardanaz MT, Fraile A, Carrasco JL, Solé F, Cuesta B, Gullón A
Genes, chromosomes & cancer. 1997 ; 18 (2) : 84-93.
PMID 9115968
Improved cytogenetics in multiple myeloma: a study of 151 patients including 117 patients at diagnosis.
Laï JL, Zandecki M, Mary JY, Bernardi F, Izydorczyk V, Flactif M, Morel P, Jouet JP, Bauters F, Facon T
Blood. 1995 ; 85 (9) : 2490-2497.
PMID 7537117
Jumping translocations of chromosome 1q in multiple myeloma: evidence for a mechanism involving decondensation of pericentromeric heterochromatin.
Sawyer JR, Tricot G, Mattox S, Jagannath S, Barlogie B
Blood. 1998 ; 91 (5) : 1732-1741.
PMID 9473240
Cytogenetic findings in 200 patients with multiple myeloma.
Sawyer JR, Waldron JA, Jagannath S, Barlogie B
Cancer genetics and cytogenetics. 1995 ; 82 (1) : 41-49.
PMID 7627933
Chromosomal analysis in multiple myeloma: cytogenetic evidence of two different diseases.
Smadja NV, Fruchart C, Isnard F, Louvet C, Dutel JL, Cheron N, Grange MJ, Monconduit M, Bastard C
Leukemia : official journal of the Leukemia Society of America, Leukemia Research Fund, U.K. 1998 ; 12 (6) : 960-969.
PMID 9639426


This paper should be referenced as such :
Brigaudeau, C
del(6q) in multiple myeloma
Atlas Genet Cytogenet Oncol Haematol. 1999;3(1):17-18.
Free journal version : [ pdf ]   [ DOI ]
On line version :

Translocations implicated (Data extracted from papers in the Atlas)

 del(6q) in Multiple Myeloma

External links

Mitelman databasedel(6q) [Case List]    del(6q) [Transloc-MCList] in [Fusion-MCList]
arrayMap (UZH-SIB Zurich)Topo ( C42) Morph ( 9732/3) -   [auto + random 100 samples .. if exist ]   [tabulated segments]
REVIEW articlesautomatic search in PubMed
Last year articlesautomatic search in PubMed
All articlesautomatic search in PubMed

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