The new National Cancer Institute classification system for fine-needle aspiration cytology is an excellent standard for reporting cytology results
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چکیده
The surgical histology report was the standard for confirming the accuracy of the diagnostic FNA cytology classification. The specificity of the FNA cytology was estimated using two approaches. One was to consider the FNA as a diagnostic test if the FNA specimens were interpreted as suspicious of malignancy or positive for malignancy, and the remaining categories were classified as negative. The other approach was to consider the FNA as a screening test if the FNA cytology specimens were diagnosed as benign or negative, and the remaining FNA cytology categories were classified as positive. Cases classified as unsatisfactory or indeterminate were excluded from calculations for both approaches because they indicate the absence of diagnostic material and the need for additional sampling rather than the presence of malignancy or benign cytology. Also excluded from calculations in the first approach—FNA as a diagnostic test—were follicular or Hürthle cell adenomas because cytology does not distinguish this group from their malignant counterparts.
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