# Histotripsy as an immune primer

Source: https://onco.cc/technologies/histotripsy-immune-priming/  
OnCo record `histotripsy-immune-priming` (Technology). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Destroying a tumour mechanically with sound, rather than heat, leaves the debris intact enough for the immune system to learn from it.

## Summary

Histotripsy liquefies tissue by cavitation without heating, so tumour antigens and danger signals survive in a form that heat coagulation destroys. Preclinical models show abscopal responses and synergy with checkpoint blockade, and the approved liver device provides a clinical platform. Human immune data are early and no randomised combination trial has reported.

## Fields

- Kind: Technology
- Status: phase-1
- Last checked: 2026-09-08
- Tags: frontier; promising
- Principle: Microsecond ultrasound pulses generate a cavitation bubble cloud that mechanically fractionates tissue at the focus, releasing intact antigens and danger signals that prime an immune response.
- Strengths: Non-thermal, so antigens survive; Non-invasive and repeatable; Approved hardware already installed in hospitals
- Limitations: Immune effect unproven in humans; Acoustic window limits which tumours can be treated; No randomised combination data

## Sources

- ClinicalTrials.gov: histotripsy: https://clinicaltrials.gov/search?term=histotripsy

## Connected records

- cancers: [Hepatocellular carcinoma](https://onco.cc/cancers/hcc/)
- fronts: [Immunotherapy](https://onco.cc/fronts/immunotherapy/), [Surgery & Interventional](https://onco.cc/fronts/surgery/)
- technologies: [Focused ultrasound & histotripsy](https://onco.cc/technologies/hifu-histotripsy/), [Immune checkpoint inhibitors](https://onco.cc/technologies/checkpoint-inhibitor/), [Thermal ablation (RFA, microwave, cryo)](https://onco.cc/technologies/thermal-ablation/)
- companies: [HistoSonics](https://onco.cc/companies/histosonics/)
- terms: [Abscopal effect](https://onco.cc/terms/abscopal-effect/), [Immunogenic cell death](https://onco.cc/terms/immunogenic-cell-death/)
- roadmaps: [Devices and physical therapies roadmap: heat and light → electric fields and focused sound → drug-releasing implants](https://onco.cc/roadmaps/devices-roadmap/), [Radical oncology: what could change the war by 2035](https://onco.cc/roadmaps/frontier-2035/)
- institutions: [UVA Comprehensive Cancer Center](https://onco.cc/institutions/uva-cancer-center/)

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