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Cell Block Preparation from Cytology Specimen with Predominance of Individually Scattered Cells
Published on: July 21, 2009
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A superior method for cell block preparation for fine-needle aspiration biopsies
Ronald Balassanian1, Geoffrey D Wool2, Jill C Ono3
1Department of Pathology, University of California at San Francisco, San Francisco, California.
Cancer Cytopathology
|April 23, 2016
Summary
The collodion bag (ColB) technique for cell blocks (CB) in fine-needle aspiration biopsies (FNABs) significantly improves cellularity, preservation, and architecture compared to plasma-thrombin (SPT) and HistoGel (HG) methods. ColB is the superior choice for diagnostic accuracy.
Area of Science:
- Surgical Pathology
- Cytopathology Techniques
- Biopsy Analysis
Background:
- Cell block (CB) preparation methods for fine-needle aspiration biopsies (FNABs) lack standardization.
- A comparative analysis was needed to determine the optimal CB technique.
Purpose of the Study:
- To directly compare three distinct cell block preparation techniques.
- To statistically validate the performance of each technique for diagnostic adequacy.
Main Methods:
- Three cell block techniques were evaluated: saline-rinsed FNAB with plasma-thrombin (SPT), formalin-rinsed FNAB with HistoGel (HG), and formalin-rinsed, centrifuged FNAB in a collodion bag (ColB).
- FNABs from 35 surgical specimens were processed using all three methods.
- A blinded review scored slides for cellularity, preservation, and architecture, with statistical analysis using the Mann-Whitney U test.
Main Results:
- The collodion bag (ColB) technique demonstrated significantly higher scores for cellularity, preservation, and architecture compared to SPT and HG (P<.05).
- No significant difference was found between the SPT and HG techniques.
- ColB yielded the best overall results in 94% of cases.
Conclusions:
- The collodion bag (ColB) technique is superior for cell block preparation.
- ColB provides enhanced cellularity, preservation, and architectural integrity, leading to improved diagnostic yield.
- This technique is recommended for routine use in cytopathology laboratories.
