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Analytical Cellular Pathology
Volume 18 (1999), Issue 2, Pages 95-102

Influence of Sampling Practices on the Appearance of DNA Image Histograms of Prostate Cells in FNAB Samples

Abdelbaset Buhmeida, Teijo Kuopio, and Yrjö Collan

Department of Pathology, University of Turku, Kiinamyllynkatu 10, Turku, SF‐20520, Finland

Received 15 October 1998; Revised 8 February 1999; Accepted 17 February 1999

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Twenty‐one fine needle aspiration biopsies (FNAB) of the prostate, diagnostically classified as definitely malignant, were studied. The Papanicolaou or H&E stained samples were destained and then stained for DNA with the Feulgen reaction. DNA cytometry was applied after different sampling rules. The histograms varied according to the sampling rule applied. Because free cells between cell groups were easier to measure than cells in the cell groups, two sampling rules were tested in all samples: (i) cells in the cell groups were measured, and (ii) free cells between cell groups were measured. Abnormal histograms were more common after the sampling rule based on free cells, suggesting that abnormal patterns are best revealed through the free cells in these samples. The conclusions were independent of the applied histogram interpretation method.