Nordgård S, Franzén G, Boysen M, Tytor M. DNA analysis of malignant salivary gland carcinomas: comparison of different tissue preparations and measuring techniques.
Acta Otolaryngol 1999;
119:510-5. [PMID:
10445070 DOI:
10.1080/00016489950181080]
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Abstract
This study correlates static and flow-cytometric analysis on paraffin-embedded and fresh material of salivary gland carcinomas. Nuclear suspensions for DNA analysis were prepared from paraffin-embedded and fresh material. Comparison of the results of static and flow cytometry on paraffin-embedded material revealed no significant correlation between DNA ploidy and S-phase value. The coefficients of variation were significantly lower for static than for flow cytometry (p < 0.05). Flow-cytometric analysis on fresh and paraffin-embedded material correlated well concerning DNA ploidy, but not for the S-phase. The coefficients of variation were significantly lower for the fresh than for the paraffin-embedded material (p < 0.001). Cytometric analysis on paraffin-embedded material of malignant salivary gland carcinomas should be critically evaluated. There is a need for flow-cytometric investigations on fresh material to clarify further the prognostic value of this method.
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