Diode-light transillumination for ophthalmic plaque localization around juxtapapillary choroidal melanomas

Paul T. Finger, Ray Iezzi, Maria L. Esteveo, Andrzej Szechter, Richard B. Rosen, Anthony Berson

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Purpose: An evaluation of plaque-mounted diode-light transillumination (DLT) for localization of episcleral plaques beneath juxtapapillary tumors. Methods and materials: Two patients scheduled for radiotherapy for juxtapapillary melanomas were offered DLT as an additional method of ophthalmic plaque localization. Plaques were constructed by affixing 4 non- heat producing, light-emitting diodes with their apertures flush with the episcleral outer surface of the plaque's rim. Bio-implantable epoxy was used to encapsulate the electronic components. Then the plaques were loaded with 103Pd seeds. After the eye-plaques were sewn to the episclera covering the base of the intraocular tumors; the diode-lights were illuminated, viewed and recorded. Photodocumentation of the relative position of the 4 lights around tumor's base was obtained in both cases. Results: Digital images of plaque- mounted diode retro-transillumination were obtained. No evidence of diode- light toxicity was noted. Both tumors were found to be covered by the ophthalmic plaques. Conclusion: Juxtapapillary tumors are often difficult or impossible to visualize with standard transillumination techniques and have been associated with poor local control rates. We have developed plaque- mounted DLT in an effort to improve ophthalmic plaque localization. Retrobulbar transillumination was viewed by indirect ophthalmoscopy and recorded with video-imaging. This technique provides unique photographic documentation of episcleral plaque localization beneath juxtapapillary tumors.

Original languageEnglish (US)
Pages (from-to)887-890
Number of pages4
JournalInternational Journal of Radiation Oncology Biology Physics
Issue number4
StatePublished - Jul 1 1999


  • Diode
  • Light
  • Localization
  • Plaque
  • Radiation

ASJC Scopus subject areas

  • Radiation
  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research


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