Abstract
Cytologic evaluation of ductal lavage or random periareolar fine-needle aspiration (FNA) specimens has been proposed to improve risk stratification of women at high risk for breast cancer. However, cytologic assessment of morphologic changes is subjective. To assess the utility of fluorescence in situ hybridization (FISH) in the categorization of breast lesions, we prospectively evaluated 32 random periareolar FNA specimens from 27 women at high risk for breast cancer. Cytologic specimens were prepared using the thin preparation technique, and diagnoses were made on the basis of previously published criteria. Specimens were also evaluated by FISH for chromosomes 1, 8, 11, and 17. Monosomy was defined as the loss of one signal or both signals in >20% of cells, and polysomy was defined as the presence of > or = 3 signals in >6% of cells. Cytologic smears from seven invasive ductal carcinomas and nine benign breast specimens from women at low risk for breast cancer were included for comparison. In the high-risk group, cytologic findings were nonproliferative epithelium (NPE) in 16 cases and hyperplasia in 16 cases. Chromosomal aberrations were detected in 11 (69%) of 16 NPE cases, 14 (89%) of 16 hyperplasia cases, seven (100%) of ...Continue Reading
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