NCT07207343

Symptomatic Abdominal Tumors Are Unsuitable for Surgical Resection, High-intensity Focused Ultrasound (HIFU) Treatment Will be Applied to the Tumors. Postoperatively, Continuous Evaluation and Analysis of the Ablation Effect Will be Performed Using CT or MRI Imaging.

To Evaluate the Safety and Efficacy of Ultrasound-guided HIFU for the Symptom Relief of Inoperable Abdominal Tumors.

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 38 (estimated)
• Sponsor: National Taiwan University Hospital · Academic / Other
• Sex: All
• Age: 20 Years
• Healthy volunteers: Not accepted

Summary

Solid tumors may cause symptoms such as pain due to compression or space-occupying effects. For patients unsuitable for surgical resection, the primary clinical recommendation for malignant tumors is chemotherapy or local radiotherapy to delay tumor progression, improve quality of life, and extend survival. For benign tumors, however, there are currently no effective alternative recommendations. For unresectable tumors, local ablation therapies such as radiofrequency ablation (RFA) are considered potential curative options. Nonetheless, the major limitations of RFA include its invasive puncture procedure, which may lead to bleeding or needle-track tumor seeding, and its reduced efficacy for tumors located adjacent to blood vessels, thereby restricting its use mainly to small hepatocellular carcinomas. High-Intensity Focused Ultrasound (HIFU) is an emerging ablation tool developed in recent years that provides non-invasive treatment for solid tumors. Its therapeutic principle involves focusing ultrasound waves onto a single point within biological tissue, where the concentrated energy generates thermal, mechanical, and cavitation effects that destroy tumor cells. Under real-time monitoring with ultrasound imaging systems, the focal point can be moved across the treatment area through various scanning approaches, thereby ablating the targeted tumor tissue. The ablated tissue will gradually be absorbed and replaced by fibrosis within the body. Since HIFU does not require needle puncture into the body, it is considered non-invasive. This clinical trial will employ the Haifu Focused Ultrasound Tumor Therapeutic System, which was approved and registered by the Taiwan Ministry of Health and Welfare in 2012 for the ablation of uterine fibroids. The proposed study targets patients with intra-abdominal benign or malignant tumors who are unsuitable for surgical resection but present with tumor-related symptoms. Tumors will be treated with HIFU, postoperative complications will be monitored, treatment response will be evaluated one month after therapy, and patient survival will be followed up to verify the clinical feasibility and safety of this system.

Conditions

• Liver Cancer
• HIFU

Interventions

Type	Name	Description
DEVICE	Haifu Focused Ultrasound tumor therapeutic System	Haifu Focused Ultrasound tumor therapeutic System is a tumor ablation technique developed in recent years that allows for non-invasive treatment of solid tumors using High-Intensity Focused Ultrasound (HIFU). This method works by physically focusing ultrasound energy at a single point within biological tissue, creating a focal zone of high-power, low-frequency ultrasound that induces mechanical fragmentation (histotripsy) and cavitation effects, dissolving the tissue into fragments and destroying tumor cells. Under real-time ultrasound imaging guidance, various scanning treatment protocols are used to move the focal point throughout the treatment zone, effectively ablating the tumor tissue. The destroyed tumor tissue is gradually absorbed by the body. Since this technique does not require needle puncture, electrode insertion, radiation, or thermal effects, it is minimally invasive and holds the potential to overcome the limitations of existing ablation technologies.

Timeline

• Start date: 2023-10-01
• Primary completion: 2026-12-31
• Completion: 2026-12-31
• First posted: 2025-10-03
• Last updated: 2025-10-03

Locations

1 site across 1 country: Taiwan