A method for marking a biopsy cavity using a delivery device is provided. The delivery device may include a tube having a lumen and a side exit port communicating with the lumen, a rod slideably located in the lumen of the tube, and a tissue marker removably located at the distal end of the tube. The tissue marker may include a bioabsorbable material and a radiopaque marker. The radiopaque marker may be a metal band, a metal wire, or identified with a number, letter, symbol, or combination thereof.