Randomized Study of Sequential Orbital Radiotherapy for Graves' Ophthalmopathy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00004660
Recruitment Status : Completed
First Posted : February 25, 2000
Last Update Posted : May 30, 2017
Mayo Clinic
Information provided by (Responsible Party):
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Brief Summary:

OBJECTIVES: I. Evaluate the effects of 20 Gy of external-beam radiotherapy to 1 orbit vs. the untreated orbit at 3 and 6 months after therapy in patients with Graves' ophthalmopathy.

II. Evaluate whether 20 Gy of external-beam radiotherapy delivered to the second orbit 6 months later in the course of the disease produces effects of equal magnitude to those observed when the first orbit was treated.

III. Relate the magnitude of treatment effects to the time since onset of eye symptoms.

IV. Evaluate whether characteristics of radiation retinopathy are present 3 years after orbital radiotherapy.

Condition or disease Intervention/treatment Phase
Graves' Disease Radiation: Radiotherapy Radiation: Sham treatment Not Applicable

Detailed Description:

PROTOCOL OUTLINE: The posterior region of 1 orbit is irradiated over 2 weeks with supervoltage equipment. The other orbit is treated 6 months later. The sequence of therapy is randomly assigned.

The untreated eye receives a simultaneous sham treatment during each radiotherapy session.

Patients are followed at 3, 6, 9, 12, and 36 months.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 42 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Phase II Randomized Controlled Study of Sequential Orbital Radiotherapy for Graves' Ophthalmopathy
Study Start Date : June 1993
Actual Primary Completion Date : January 1998
Actual Study Completion Date : January 1998

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Eye Diseases

Arm Intervention/treatment
Experimental: Radiotherapy Radiation: Radiotherapy
Sham Comparator: Sham treatment Radiation: Sham treatment

Primary Outcome Measures :
  1. Orbital Volume [ Time Frame: 1 year ]
    Orbital fat and muscle volumes

Information from the National Library of Medicine

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Ages Eligible for Study:   30 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


--Disease Characteristics-- Firm diagnosis of Graves' disease with normal thyroid function, i.e.: Thyroid-stimulating immunoglobulin positive Thyroxine 5-12.5 micrograms/dL Tri-iodothyronine 80-180 nanograms/dL Thyroid-stimulating hormone 0.2-8 milli-International unit (mIU/L) Euthyroid due to therapy acceptable Ophthalmopathy meeting at least 3 of the following criteria: Chemosis or lid edema Lid lag, lid retraction, or restrictive lagophthalmos Proptosis at least 20 mm by Krahn exophthalmometry in at least 1 eye Less than 4 mm discrepancy between eyes Patient perception of "stare" or "bulge" Extraocular muscle motion restriction in 1 or both eyes on clinical exam or by patient report of diplopia at extremes of gaze Extraocular muscle enlargement on computerized tomography (previous study results acceptable) Mild to moderate ophthalmopathy, i.e.: Orbital pain Lacrimation Photophobia Visual blurring or diplopia No optic neuropathy, i.e.: Afferent pupillary defect Impaired color vision on D-15 testing (unless congenital color perception deficiency) Visual field defect Impaired visual acuity No corneal ulcers --Prior/Concurrent Therapy-- No prior external-beam radiotherapy to the head and neck At least 2 weeks since corticosteroids --Patient Characteristics-- No prior head and neck tumors No diabetes No pregnant women

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00004660

United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55905
Sponsors and Collaborators
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Mayo Clinic
Study Chair: Colum A. Gorman Mayo Clinic

Publications of Results:
Responsible Party: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Identifier: NCT00004660     History of Changes
Other Study ID Numbers: 199/11860
MAYOC-1889200 ( Other Identifier: Mayo Clinic )
R01DK042822 ( U.S. NIH Grant/Contract )
First Posted: February 25, 2000    Key Record Dates
Last Update Posted: May 30, 2017
Last Verified: May 2017

Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK):
Graves' disease
thyroid disease
endocrine disorders
rare disease

Additional relevant MeSH terms:
Graves Disease
Eye Diseases
Graves Ophthalmopathy
Orbital Diseases
Thyroid Diseases
Endocrine System Diseases
Autoimmune Diseases
Immune System Diseases
Eye Diseases, Hereditary