Patent ID: 8744554

Claim:
A method of marking a lesion in a tissue mass in a patient, the method comprising: providing a localizing wire and a tube having at least one lumen, the localizing wire comprising a localizing thread and a localizing anchor having a collapsed shape delineating a first bounded area when the localizing anchor is in the at least one lumen and an expanded shape delineating a second bounded area when the localizing anchor is outside the at least one lumen, wherein the second bounded area results from an area expansion of the first bounded area; inserting the tube, with the localizing anchor in the collapsed shape in the at least one lumen, into the tissue mass; moving one of the localizing wire and the tube to place the localizing anchor outside the at least one lumen at a first selected location relative to the lesion to release the anchor from the collapsed shape to expand to the expanded shape for exerting an expansive force by the localizing anchor against the tissue mass without puncturing the tissue mass at the first selected location relative to the lesion, wherein the collapsed shape is defined by four angled internal corners with only one internal corner being greater than 90 degrees, and the expanded shape is a triangle.