SALT LAKE CITY--(BUSINESS WIRE)--BSD Medical Corporation (AMEX:BSM) today announced that it received a letter from the Food and Drug Administration (FDA) regarding its Premarket (PMA) submission for the BSD-2000 Hyperthermia System. The letter from the FDA provides guidance as to amendments needed to make the PMA approvable. The company is currently preparing its response to the amendments proposed by the FDA.