Pre-operative sampling of suspicious lymph nodes in the axilla has historically been very difficult. This area is highly vascular and many physicians do not feel comfortable acquiring tissue in this region. Fine needle aspiration under ultrasound-guidance is one method for acquiring tissue in the axilla; however this method is heavily dependent on the physician’s technique and level of experience. Current spring-loaded core devices on the market are not practical for use in the axilla, as the true depth post-fire is unknown.
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