Proton Beam Therapy for Chondrosarcoma

March 5, 2026 updated by: M.D. Anderson Cancer Center

Phase II Evaluation of Proton Beam Therapy for Skull Base Chondrosarcoma

The goal of this clinical research study is to learn if proton beam therapy, with or without photon beam radiation therapy, is effective in the treatment of skull base chondrosarcoma. The safety of this treatment will also be studied.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

Patients who have skull base chondrosarcoma require complicated treatment because of its challenging location and nearness to critical structures within the brain.

Pathology will be confirmed prior to discussion of the study.

If you are found to be eligible to take part in this study, you will receive proton beam therapy, no sooner than 2 weeks after the last surgery to remove tumor. You will receive proton beam therapy once a day for about 35 treatments (7 weeks). Treatment will be given for 5 days in a row each week (except for Saturdays, Sundays, and holidays) at the Proton Center in Houston. The whole process should take up to 1 hour each day.

If your doctor feels it is necessary, the proton beam therapy may be combined with standard photon therapy.

After the proton beam, and possibly photon beam, therapy, you will be asked to come in for study follow-up visits every year, until the study is completed. At these visits, you will have magnetic resonance imaging (MRI) scans, blood draws (less than 1 teaspoon) to monitor your pituitary function, and neuropsychological testing. For the neuropsychological testing, you will be interviewed and tested by a neuropsychologist to evaluate your memory, fluency (the ability to talk and form words) complex thinking ability, planning ability, and coordination. These tests could last from 1-2 hours. You will also have eye exams performed by an ophthalmologist from MD Anderson and hearing exams. It is anticipated that it will take about 5 years to complete this study.

This is an investigational study. The proton beam center and its treatment are approved by the FDA for patient use. A total of up to 15 patients will take part in this study. All will be enrolled at MD Anderson.

Study Type

Interventional

Enrollment (Actual)

15

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 Locations

    • Texas
      • Houston, Texas, United States, 77030
        • MD Anderson Cancer Center

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Pathologically confirmed Grade 1-3 chondrosarcoma of the skull base
  2. Contrast enhanced postop MRI or CT if there is clinical contraindication for MRI of the skull base obtained with 90 days of study registration at M. D. Anderson
  3. The patient has been assessed by MDACC skull base surgeons to have undergone maximal surgical debulking of disease
  4. Karnofsky Performance status greater than or equal to 60
  5. Signed informed consent

Exclusion Criteria:

  1. Previous irradiation of the skull base
  2. Documented evidence of disseminated metastatic disease

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: Proton Beam Therapy
Proton Beam Therapy - A total dose of up to 70 CGE given at 2.0 CGE per daily fraction for 35 fractions.
A total dose of up to 70 CGE given at 2.0 CGE per daily fraction for 35 fractions.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Time to Local Recurrence
Time Frame: Baseline to local recurrence (evaluation every six months during estimated 5 year study)
Local recurrence defined as progression on magnetic resonance imaging (MRI) or CT if MRI is contraindicated.
Baseline to local recurrence (evaluation every six months during estimated 5 year study)

Collaborators and Investigators

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

Investigators

  • Principal Investigator: David Grosshans, MD,PHD, M.D. Anderson Cancer Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

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)

April 28, 2006

Primary Completion (Estimated)

August 19, 2026

Study Completion (Estimated)

August 19, 2026

Study Registration Dates

First Submitted

July 2, 2007

First Submitted That Met QC Criteria

July 2, 2007

First Posted (Estimated)

July 4, 2007

Study Record Updates

Last Update Posted (Actual)

March 9, 2026

Last Update Submitted That Met QC Criteria

March 5, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • 2004-0915
  • NCI-2012-01510 (Registry Identifier: NCI CTRP-Clinical Trials Reporting Registry)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

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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