Abstract: A template for controlling the location and guiding of needles in a patient's breast preparatory to placement of radioactive seeds. The template has a pair of template blocks, each having a plurality of pre-drilled needle holes arranged in the same pattern and a template bridge adjustably connected to the top thereof to hold the template blocks with the needle holes in alignment. A shell having a part shaped to a portion of the patient's breast is adjustably fixed to the template for orienting the template blocks to the patient's breast whereby needles can be passed through the pre-drilled needle holes at predetermined locations and in a predetermined pattern.