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. 2000 Jan 18;82(2):330–338. doi: 10.1054/bjoc.1999.0923

Association of specific chromosome alterations with tumour phenotype in posterior uveal melanoma

K Sisley 1,2, M A Parsons 2, J Garnham 3, A M Potter 3, D Curtis 3, R C Rees 4, I G Rennie 2
PMCID: PMC2363277  PMID: 10646885

Abstract

Posterior uveal melanomas have recurrent alterations of chromosomes 1, 3, 6 and 8. In particular, changes of chromosomes 3 and 8 occur in association, appear to characterize those tumours with a ciliary body component, and have been shown to be of prognostic significance. The relevance of other chromosome alterations is less certain. We have performed cytogenetic analysis on 42 previously untreated primary posterior uveal melanomas. Of interest was the observation that as tumour size increased the involvement of specific chromosome changes, and the amount of chromosome abnormalities likewise increased. Loss, or partial deletions, of the short arm of chromosome 1 were found to associate with larger ciliary body melanomas; typically, loss of the short arm resulted from unbalanced translocations, the partners of which varied. Trisomy of chromosome 21 occurred more often in ciliary body melanomas, whilst rearrangements of chromosomes 6 and 11 were primarily related to choroidal melanomas. Our results imply that alterations of chromosome 1 are important in the progression of some uveal melanomas, and that other chromosome abnormalities, besides those of chromosomes 3 and 8, are associated with ocular tumours of particular locations. © 2000 Cancer Research Campaign

Keywords: cytogenetics, translocation, uveal melanoma, phenotype

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Selected References

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