Abstract
Background: Cell block is an indispensable supplement in the practice of cytopathology. The diagnostic utility of cytology specimens is significantly impacted by the capacity to generate sufficient cell blocks obtained from concentrated fluid samples or fine-needle aspiration specimens after routine processing. This routine processing involves getting directed passes to produce a cell block, especially if the cytopathologist believes additional immunocytochemical stains and/or molecular studies would be required. Objective: This study compared two methods of cell block preparation: the sodium alginate (SA) method and the plasma thrombin (PT) method. A comparison was made regarding overall cellularity, morphological preservation, and concealed artifacts. Methodology: This cross-sectional study evaluated 104 serous fluid samples and fine-needle aspirates. Cell blocks were prepared for each sample using the plasma thrombin and sodium alginate technique. The formalin-fixed, paraffin-embedded cell blocks were subjected to histochemical staining with hematoxylin and eosin, and slides were assessed for cellularity, artifacts, and morphological preservation. Results: The study utilized chi-square tests to analyze cellularity, morphology, and artifact presence, demonstrating significant differences in cellularity and artifacts between the two methods, with the sodium alginate method showing more cellularity and more artifacts, while morphologically, there was no significantdifference between the two methods. Conclusion: Our study's findings have practical implications for cytopathologists. We conclude that, compared to plasma thrombin methodology, the sodium alginate cell block technique yields higher cellularity, while there was no difference in morphology. Even though artifacts were more prevalent in sodium alginate cell blocks than in plasma thrombin cell blocks, our study suggests that the former can be a better alternative for cell block examination.
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