Thermotherapy in Addition to SOC Palliative Radiotherapy

This study tests whether adding heat therapy (thermotherapy using a device called Hydrosun) alongside standard palliative radiation therapy improves pain relief or tumor response in people with incurable cancer that has spread near the skin or to lymph nodes. **You may be eligible if...** - You are 18 or older with confirmed cancer that cannot be cured or operated on - You have a tumor close to the skin surface or a swollen lymph node that is suitable for heat treatment - You are already scheduled for palliative radiation therapy - You are generally well enough to carry out daily activities (ECOG 0–1) **You may NOT be eligible if...** - You do not have a suitable superficial tumor or lymph node for heat treatment - Your radiation plan doesn't match the specific doses used in this study - You have a psychiatric disorder or substance use problem that would affect participation Talk to your doctor to see if this trial is right for you.