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Pterygium Treatment Using Single Beta-therapy as Adjuvant Treatment Compared to Conjunctival Autograft

This study has been completed.
Information provided by:
Marilia Medicine School Identifier:
First received: November 30, 2009
Last updated: December 1, 2009
Last verified: December 2009
PURPOSE: To affirm the effectiveness and complication rate of postoperative single-dose beta-irradiation (RT) with (90) Sr in the case of primary pterygium in a clinical trial. METHODS AND MATERIALS: This trial was designed as a prospective, randomized, single center study. Surgery was performed in all cases according to the conjunctival autograft technique. One thousand and four patients with 108 pterygia were postoperatively randomized to either beta-RT or observation. In the case of beta-RT, a (90) Sr eye applicator was used to deliver 1000 cGy to the sclera surface at a dose rate of between 200 and 250 cGy/min. After treatment, both an ophthalmologist and a radiation oncologist performed the follow-up examinations. The accumulated data were analyzed using a group sequential test. RESULTS: Between February 2007 and September 2008, 104 eyes with primary pterygium were operated on according to the trial protocol. Additional treatment was performed within 24 hours postoperatively. Four patients were lost to follow-up, resulting in 104 patients who could be analyzed. In the 54 eyes randomized to receive beta-RT, 5 relapses occurred compared with 8 recurrences in the 50 eyes that no received RT, for a crude control rate of 90.7 % vs. 84 %, respectively. At a mean follow-up of 9 months (range 4- 18), major treatment complications had not been observed . CONCLUSION: Single-dose beta-RT of 1000cGy after conjunctival autograft surgery is a simple, effective, and safe treatment that reduces the risk of primary pterygium recurrence.

Condition Intervention Phase
Pterygium Radiation: beta-irradiation Procedure: conjunctival autograft Phase 3

Study Type: Interventional

Further study details as provided by Marilia Medicine School:

Arms Assigned Interventions
Experimental: conjunctival autograft plus beta-irradiation Radiation: beta-irradiation
Active Comparator: conjunctival autograft Procedure: conjunctival autograft


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All

Inclusion Criteria:

  • Fresh pterygium without previous treatment.
  • Adult patients with age higher than 18 years.

Exclusion Criteria:

  • Diagnosis of glaucoma.
  • Previous treatment of pterygium.
  • Patients with age less than 18 years old.
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Please refer to this study by its identifier: NCT01024257

Gustavo Viani Arruda
Marilia, Saop Paulo, Brazil, 17516660
Sponsors and Collaborators
Marilia Medicine School
  More Information Identifier: NCT01024257     History of Changes
Other Study ID Numbers: Famema0010
Study First Received: November 30, 2009
Last Updated: December 1, 2009

Keywords provided by Marilia Medicine School:
beta-irradiation;conjunctival autograft;pterygium;recurrence; clinical trial

Additional relevant MeSH terms:
Conjunctival Diseases
Eye Diseases processed this record on August 17, 2017