Significance of proliferative epithelial changes in breast fine-needle aspiration.

The authors analyzed 6439 fine-needle aspirations (FNA). The total number of FNA performed per year at the authors' institution was found to be increasing. The authors analyzed the numbers of carcinomas and proliferative breast alterations separately. A statistically significant increase was recorded in the group of aspirate specimens that had epithelial proliferation; the increase was greater than that seen in aspirate specimens with normal epithelium (P less than 0.001). Biopsy was recommended in 151 of 6439 (2.3%) FNA and performed for 67 of the 151 (1.0%) recommendations. Cytologic findings were compared with pathohistologic findings. A histologic carcinoma was found in 14 of 67 (20.8%) patients who had biopsy performed. The authors concluded that clinicians should give particular attention to atypia in cytologic aspirate specimens.