Abstract: Provided is a method for treating metastatic disease or any other tumor that cannot easily or readily localized or localized at all using immersion mechanotherapy. The method includes providing a vessel containing an amount of medium for immersing at least a portion of a subject, and applying one or more programmed cycles of ultrasound waves to the subject through the medium for a pre-determined period of time. Also provided is a device for implementing the immersion mechanotherapy.