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. 1978 Feb;37(2):231–239. doi: 10.1038/bjc.1978.31

Cytogenetics of malignant epithelial cells and lymphoblastoid cell lines from nasopharyngeal carcinoma.

S Finerty, J E Jarvis, M A Epstein, P A Trumper, G Ball, B C Giovanella
PMCID: PMC2009587  PMID: 629860

Abstract

The malignant epithelial cells of nasopharyngeal carcinoma (NPC) and cells of lines derived form the lymphoid cells which infiltrate this tumour have been investigated cytogenetically. Chromosome spreads of lymphoblastoid cells of lines established from 7 different NPC biopsy specimens were examined after banding staining. Banding was also applied to the epithelial tumour cells of 5 further biopsy specimens freed from non-malignant infiltrating cells by passage through nude mice; epithelial cell spreads were obtained by in vivo splindle arrest. Five of the lymphoblastoid lines were found to be diploid, and 2 tetraploid; the karyotypes were essentially normal. The squamous epithelial nature of the cells in the nude-mouse-grown NPC tumours was established by light and electronmicroscopy, and 3 tumours were found to be near-triploid, and 2 near-diploid. The cells of the near-triploid tumours contained grossly abnormal chromosomes but those of the near-diploid tumours showed only relatively minor changes. Although abnormalities were observed which were specific for cells from each individual tumour, no discernible change was common to cells from all the tumours.

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