Rats afflicted with liver cancer have demonstrated the efficacy of a fascinating, non-invasive treatment.
Using focused ultrasound, scientists have managed to destroy up to 75 percent of the volume of a liver tumor. The treatment also seems to trigger the rats' immune systems into taking over and clearing the rest.In 80 percent of the animals, the cancer seemed to be destroyed, with no sign of metastases or recurrence in the three months they were monitored for, the researchers said.
The way it works is by ultrasound cavitation – similar to the method used to non-invasively break down fat cells for weight-loss treatments. Waves of ultrasound are directed at the area to be treated; the vibrations generate tiny bubbles in the targeted tissue. When the bubbles collapse, or burst, the tissue is disrupted, destroying that part of the tumor.It's not often possible to target the entire tumor.
For the purpose of this study, 22 lab rats were implanted with liver cancer. Half were left as a control group, while the remaining 11 were treated using histotripsy, targeting between 50 and 75 percent of the tumor volume.
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