Axillary Lymph Nodes: US-guided Fine-Needle Aspiration for Initial Staging of Breast Cancer Correlation with Primary Tumor Size

Susan L. Koelliker, Maureen A. Chung, Martha B. Mainiero, Margaret M. Steinhoff, and Blake Cady
Radiology 2007;246 81-89
http://radiology.rsnajnls.org/cgi/content/abstract/246/1/81?etoc

US-guided fine-needle aspiration is useful in the initial axillary staging of breast cancer; the sensitivity of the technique increases with increasing tumor size