Cell Blocks in Cytopathology and Their Role in Evaluation of Thyroid Aspirates

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Thyroid FNA Cytology
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Abstract

With the impetus shifting to minimally invasive procedures, cytology sampling has become of paramount significance, and CBs provide a multifaceted platform for auxiliary testing. Currently, various methods of CB preparation are available, each with their own merits and demerits owing to various factors related both to the acquisition of samples and the processing of specimens. FNA has been a powerful diagnostic tool for evaluation of thyroid nodules, effectively reducing unnecessary surgeries. Recent advances in the understanding of the molecular pathways underlying thyroid carcinogenesis have led to the evolution of a new diagnostic approach with incorporation of immunohistochemical and molecular testing leading to the generation of an integrative diagnostic report. In this context, the role of CBs in thyroid cytology can hardly be overstated. The combination of cytology with cell block in thyroid aspirates have not only increased the representativeness of the samples with lower false-negative rates but also added to the possibility of commissioning immunocytochemistry and molecular analyses, whenever needed. However, this results in an increased turnover time with added burden in manpower and cost restrained settings. In such circumstances, an apt resolution would be to prepare CBs only as needed, for instance, in case of ambiguous results of the aspirate smears or the need to employ ancillary tests for confirmation of the diagnosis.

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Dutta, R., Rohilla, M., Srinivasan, R., Jain, D. (2023). Cell Blocks in Cytopathology and Their Role in Evaluation of Thyroid Aspirates. In: Kakudo, K., Liu, Z., Jung, C.K., Hirokawa, M., Bychkov, A., Lai, CR. (eds) Thyroid FNA Cytology. Springer, Singapore. https://doi.org/10.1007/978-981-99-6782-7_75

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