The use of hyperthermia in radiation oncology is well established. Many publications cover the whole field of possibilities and problems of this therapeutic modality. The new development of interstitial and intracavitary hyperthermia, however, is not well known: there are only a few relevant publications in different journals. Therefore, it was appropriate that SAUER and SEEGENSCHMIEDT organized an international meeting on this topic, where experiences with this new and promising technique...