Bevacizumab in the Treatment of HHT

September 14, 2026 updated by: Second Affiliated Hospital, Zhejiang University, School of Medicine

Observation on the Efficacy of Bevacizumab in the Treatment of Hereditary Haemorrhagic Telangiectasia

Clinical Study Abstract (Ethics Application) Hereditary hemorrhagic telangiectasia (HHT) is a rare autosomal dominant vascular disorder characterized by recurrent intractable epistaxis and multi-organ arteriovenous malformations. Moderate-to-severe patients often develop refractory anemia with severely impaired quality of life. Current stepwise therapeutic strategies have substantial limitations, including frequent adverse reactions of thalidomide, high recurrence rates after electrocoagulation, and severe surgical trauma, resulting in a lack of safe and individualized treatment options. Our preliminary clinical practice has verified the promising efficacy and long-term benefits of bevacizumab in severe HHT-related epistaxis. However, obvious interindividual variability and occasional adverse events exist, and the underlying mechanism remains unclear. This study aims to systematically evaluate the efficacy and safety of bevacizumab for severe HHT-associated epistaxis, explore the influences of baseline clinical and genetic factors on prognosis, and investigate the mechanism of treatment heterogeneity, so as to optimize individualized therapeutic strategies and provide clinical evidence for precise management of HHT in China.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

40

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310009
        • Recruiting
        • The Second Affiliated Hospital, Zhejiang University School of Medicine
        • Contact:
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Definite HHT diagnosis is established by either clinical assessment according to the Curaçao criteria or genetic confirmation.

Clinical diagnosis (Curaçao criteria)

Patients who meet at least 3 of the following 4 items are diagnosed with definite HHT:

Spontaneous, recurrent epistaxis Multiple mucocutaneous telangiectasias at typical sites Visceral arteriovenous malformations (lung, liver, brain, gastrointestinal tract, etc.) Positive family history of HHT in a first-degree relative Genetic diagnosis Identification of a pathogenic germline mutation in HHT-associated genes (ENG, ACVRL1) confirms the diagnosis of HHT.

Exclusion Criteria:

  • Minors, patients with mild epistaxis that can be well controlled by other treatments, and patients with any contraindication to bevacizumab treatment.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Experiment
surgery combined with intravenous injection of bevacizumab
Drug: Bevacizumab
Bevacizumab is administered intravenously at 5 mg/kg body weight, 1 to 2 times annually, starting one month after nasal electrocoagulation.
Procedure: nasal electrocoagulation.
nasal electrocoagulation.
Active Comparator: Active comparator
Surgery combined with oral thalidomide
Procedure: nasal electrocoagulation.
nasal electrocoagulation.
Drug: Thalidomide (50mg)
Oral thalidomide is initiated at 50 mg twice daily (100 mg per day) one month after nasal electrocoagulation.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
ESS
Time Frame: 1,3.6.12 months after surgery
Epistaxis Severity Score
1,3.6.12 months after surgery
Hb
Time Frame: 1,3,6,12months after surgery
Hemoglobin (Hb)
1,3,6,12months after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Second Affiliated Hospital, Zhejiang University, School of Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 1, 2025

Primary Completion (Estimated)

September 1, 2029

Study Completion (Estimated)

September 1, 2029

Study Registration Dates

First Submitted

September 14, 2026

First Submitted That Met QC Criteria

September 14, 2026

First Posted (Actual)

September 18, 2026

Study Record Updates

Last Update Posted (Actual)

September 18, 2026

Last Update Submitted That Met QC Criteria

September 14, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2025-0369

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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