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Br J Ophthalmol 1999;83:646-651 doi:10.1136/bjo.83.6.646
  • Original Article
    • Clinical science

Radiotherapy for isolated occult subfoveal neovascularisation in age related macular degeneration: a pilot study

  1. Guy Donatia,
  2. Dominique Soubraneb,
  3. Maddalena Quarantab,
  4. Gabriel Coscasb,
  5. Gisele Soubraneb
  1. aEye Clinic, Department of Clinical Neurosciences, University Hospitals of Geneva, bUniversity Eye Clinic, Hospital of Creteil, University of Paris XII, Paris, France
  1. G Soubrane, University Eye Clinic, Centre Hospitalier Intercommunal, 40 Avenue de Verdun, 94010 Créteil, France
  • Accepted 3 December 1998

Abstract

BACKGROUND/AIMS Teletherapy has been proposed as a possible treatment for choroidal neovascular membranes (CNV), secondary to age related macular degeneration (AMD) not amenable to laser photocoagulation. The aim of this prospective study has been to investigate the effect of teletherapy on isolated occult choroidal neovascular membranes of subfoveal location.

METHODS 28 AMD patients presenting with retrofoveal isolated occult CNV demonstrated by fluorescein angiography were treated by external beam radiation. A complete ophthalmological examination, fluorescein angiography, and indocyanine green angiography (ICG) were performed within 15 days before treatment and repeated at follow up. A total dose of 16 Gy was applied in four sessions of 4 Gy using a 4 MeV photon beam. Follow up ranged from 6 to 9 months (mean follow up 6.4 months).

RESULTS Visual acuity was found to be stable in 68% of the cases. The decrease in visual acuity was of 3–6 lines in 18% and of more than 6 lines in 10% of the eyes at last examination. On fluorescein angiography the size of the lesion area was found to be stable in 67%, decreased in 13%, and increased in 20% of the cases. On ICG angiography the size of the CNV was stable in 93% and increased in 7% of the cases. All the eyes experiencing a visual acuity decrease showed either no change or an increase in size of the membrane on fluorescein angiography and/or on ICG.

CONCLUSION According to this study with strict inclusion criteria, external beam radiotherapy seems to have a beneficial effect on the evolution of isolated occult subfoveal CNV.

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