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. 1991 Nov;64(5):948–952. doi: 10.1038/bjc.1991.432

DNA ploidy in primary testicular cancer.

S D Fosså 1, J M Nesland 1, E O Pettersen 1, O Amellem 1, H Waehre 1, K Heimdal 1
PMCID: PMC1977463  PMID: 1931622

Abstract

The DNA stemline ploidy was measured by flow cytometry (FCM) in 129 samples from paraffin-embedded primary testicular tumours (61 seminomas, 68 non-seminomas). Only one DNA stemline was found in 38 seminomas and 44 non-seminomas. Two seminomas and one non-seminoma were DNA diploid, the other tumours being non-diploid. Twenty-three seminomas and 24 non-seminomas displayed two or three DNA stemlines. The median minimal DNA index (DI) of all seminomas was significantly higher than that of all non-seminomas (1.58 vs 1.43; P: 0.008). Three seminomas removed from two monozygotic twins within 1 week had DIs of 1.66, 1.56 and 1.59. In this limited series there was no association between DNA ploidy of the primary tumour and the metastatic status for either seminomas or non-seminomas. The results support the pathogenetic model stating that at least some (if not all) non-seminomas develop from a seminoma by additional chromosomal aberration. The clinical relevance of DNA stemline ploidy has to be further evaluated in larger series.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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