“…Streffer, Leeper et al [24] and Gerwick et al [22,23] demonstrated that under low pH conditions, the phenomenon of thermotolerance is and in clinical studies [3-5, 11, 15, 25, 27, 36, 38-40, 45-47]. Early patient studies were mainly done in recurrent nodes in chest wall or neck locations [3-5, 25, 39] as well as cutaneous deposits of malignant melanoma or lymphoma [13,36]. Since most of these recurrences followed failure of high dose radiation, hyperthermia was combined with low dose radiation.…”