This invention is an improved tissue-localizing device with an
electrically energized locator element for fixedly yet removably marking
a volume of tissue containing a suspect region for excision. The
electrical energizing of the locator element facilitates the penetration
of the locator element in to subjects tissue and minimizes resistance due
to dense or calcified tissues. At least one locator element is deployed
into tissue and assumes a predetermined curvilinear shape to define a
tissue border containing a suspect tissue region along a path. Multiple
locator elements may be deployed to further define the tissue volume
along additional paths defining the tissue volume border that do not
penetrate the volume. Delivery of electric cut-rent may be achieved
through monopolar or bipolar electronic configuration depending on design
needs. Various energy sources, e.g., radio frequency, microwave or
ultrasound, may be implemented in this energized tissue-localizing
device.