Whole-body thermal therapy as adjuvant therapy to radiation in a dog with metastasized anal sac adenocarcinoma

An eleven-year-old Galgo Espagnol was diagnosed with metastasized anal sac adenocarcinoma. The patient was enrolled into a clinical trial and underwent three “whole-body thermal therapy” (WBTT) sessions combined with four hypofractionated radiotherapy sessions during a ten-weeks’ time period. The medical device and corresponding treatment protocol were designed by ElmediX (ElmediX NV, Belgium). Air was injected at high speed in a treatment chamber and automatically regulated to reach and maintain a body temperature of 41.5°C for eight hours. Thermometry was ensured by temperature sensors placed in and on the patient. During four radiotherapy sessions, an external beam delivered hypofractionated doses of 6Gy on both the primary tumor and the metastatic lymph nodes. Clinical monitoring and assessment of quality of life confirmed that the WBTT sessions were well tolerated. Although burn wounds at pressure points occurred, prolonged severe adverse effects were not observed. Furthermore, the disease progression was deemed slower than the expected progression based on the literature.