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Identification of Biological Samples in a Case of Contamination of a Cytological Slide Preparation

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Abstract:

Abstract: 

Here we report a case where a discrete section of the cytological slide preparation of a female individual was obviously contaminated with pleura liquid of a female tumor patient. Analysis of the cancerous pleura liquid and the healthy cells of the slide preparation showed different DNA profiles, indicating that the material originated from two different female individuals. The DNA profile of the cell mixture revealed a heterogenous pattern whereby the alleles could be assigned to the healthy and the tumor patient. Loss of heterozygosity (LOH) was observed in four of eight short tandem repeat systems for the pleura liquid and the cell mixture. Despite the low amount of DNA on the slide preparation and the occurrence of LOH, it was possible to clarify the case and to support the assumption that a drop of cancerous pleura liquid contaminated the cytological slide.

Keywords: cell mixture; cytological preparation; forensic science; loss of heterozygosity; short tandem repeat analysis

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1556-4029.2008.00724.x

Publication date: 2008-05-01

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