This study was performed in order to evaluate the accuracy and the usefulness of the fine needle aspiration cytology(FNAC) on the breast lesions. to compare the FNAC findings between fibroadenoma and fibrocystic disease, and to determine
the
accuracy of cytologic Black's grading. The subjects in this study were 110 cases of FNAC, later confirmed by biopsy, between January 1988 and December 1991.
@ES The results are as follows:
@EN 1. Comparison between the results of the FNAC and the histologic findings revealed that FNAC had a sensitivity of 96.6%, a specificity of 100%. a false negative rate of 3.4% a false positive rate of 0.0% and an overall diagnostic accuracy or
98.2%.
2. Semi-quantitative evaluation of epithelial celluarity, stroma, and naked nuclei in the smears of aspirate showed high celluarity in 66.7% of the aspirates for fibroadenoma and in 0% of those from fibrocystic disease. Abundant stroma was
found in
46.7% of the fibroadenoma and none of fibrocystic disease Numerous naked nuclei were found in 60% of the fibroadenoma and 4.5% of the fibrocystic disease. The overall diagnostic accuracy was 98%.
3. In order to determine the accuracy of Black's nuclear grading of FNAC on breast carcinoma, we retrospectively studied 38 cases of ductal carcinomas diagnosed by FNAC with subsequent histologic confirmation. The concordance rate with
histology was 94.7%.
These results suggest that FNAC of breast is a diagnostically accurate method, and provide for the preoperative differential diagnosis between fibroadenoma and fibrocystic disease. Our results also suggest that the evaluation of nuclear
grading
of FNAC can predict clinical outcome and decide the way of management of breast cancer.
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