Biopsy devices and methods

An improved clip for marking breast tissue of a biopsy site or the site of an aspirated cyst during a radiographic analysis, the clip extending along an axis between a first end and a second end and comprising a metal structure consisting essentially of:

• a first arc segment having a first end located at the first end of the clip and a second end located at the second end of the clip;
• a second arc segment having a first end located at the first end of the clip and a second end located at the second end of the clip, the second arc segment being coplanar with the first arc segment;
• an encasement, which includes or comprises agents adapted to assist in the treatment of tissue, enclosing a portion of the clip, and exposing the first ends of the first and second arc segments upon deployment;
• and
• an apex disposed along the clip axis defining where the first and second arc segments adjoin and converge,
• wherein, after being driven through an exit opening of a delivery tube of a delivery device, the metal structure is configured to engage breast tissue, wherein the metal structure is configured so that
• (i) it resides entirely within the delivery tube prior to being driven through the exit opening,
• (ii) it deploys through the exit opening of the delivery device, and
• (iii) in both an original pre-deployment state and a post-deployment state:
• the first ends of the first and second arc segments project in a direction outward relative to the clip axis, and the second ends of the first and second arc segments project in a direction outward relative to the clip axis, while residing within the delivery tube,
• the first ends of the first and second arc segments project in a direction generally away from the second ends of the first and second arc segments;
• (iv) while it resides within the delivery tube prior to being driven through the exit opening, and after being driven though the exit opening the first and second arc segments are arcuate;
• and
• (v) the first ends of the first and second arc segments engage breast tissue after being driven through the exit opening of the delivery tube, and thereby substantially preventing migration of the deployed clip within the breast tissue.