from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The condition of being polysomic

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun congenital defect of having one or more extra chromosomes in somatic cells


Sorry, no etymologies found.


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  • On Sunday, December 13, Genomic Health researchers presented results of a large retrospective case-control study assessing the diagnosis of HER2 status, by both fluorescent in situ hybridization (FISH) testing and quantitative RT-PCR by Oncotype DX, to explore the association between polysomy 17 (extra copies of chromosome 17, a condition found in breast cancer patients that can complicate the interpretation of HER2 testing results), HER2 status and breast cancer death.

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