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HIFU Treatment of Cutaneous Neurofibromas in Neurofibromatosis Type 1: Safety and Efficacy

NCT05119582 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2024-10-16

Study results available
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Summary

The overall objective is to demonstrate safety and efficacy of HIFU treatment of cutaneous neurofibromas located close to the surface of the skin in patients with the genetic disease Neurofibromatosis Type 1. The study will use a new investigational equipment that has been specially developed for dermatological therapy.

The study includes 20 patients in total distributed between the two centers, each having a minimum of 8 cutaneous neurofibromas eligible for treatment. All participants are adults (over 18 years) of both sexes.

The new treatment method is based on focusing intensive ultrasound just below the skin surface. This creates a very fast localized heating in small and very well-defined volumes containing neurofibroma tissue. This heating destroys or weakens the tissue, and the body's natural processes will subsequently transport affected cells away through the lymphatic and vascular systems. During the healing-process, the rejected tissue is replaced by new skin cells that are not expected to be fibrous.

The treatment is intended to be carried out without breaking the skin surface, and open wounds are therefore avoided. This is an essential advantage of the method compared to all existing therapies, which are based on physical removal of tumors through an open skin surface (e.g. surgery or laser therapy). Complications with risk of pain, infection and scarring will therefore be significantly reduced with the new proposed method.

The treatment is carried out by sending focused ultrasound from the handpiece of the equipment into the target area with neurofibromas. The equipment is set to send doses of approximately 150 milliseconds (0.15 seconds). The skin area and HIFU doses can be followed on the system computer screen and will be placed side-by-side with approximately 1-2 millimeter spacing. To achieve good energy transfer from handpiece to skin, ordinary ultrasound gel is used. There are no other special pre-treatments or preparations for the process. HIFU treatment is expected to be less painful than other treatments used. The treatment is quick, and typically takes less than 1 minute for a each area the size of a typical neurofibroma.

Conditions

  • Cutaneous Neurofibroma

Interventions

DEVICE

TOOsonix System ONE-M

Selected neurofibromas will be treated by high intensity focused ultrasound. Untreated fibromas will be used for controls.

Sponsors & Collaborators

  • Sahlgrenska University Hospital

    collaborator OTHER

  • Joergen Serup

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2022-04-13
Primary Completion
2024-01-17
Completion
2024-01-17

Countries

  • Denmark
  • Sweden

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05119582 on ClinicalTrials.gov