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Robert J. Buys, MD; David H. Abramson, MD; Robert M. Ellsworth, MD; Barrett Haik, MD

Arch Ophthalmol. 1983;101(8):1206-1208.

Abstract
• An analysis of 31 eyes of 30 patients who had been treated with cobalt plaques for retinoblastoma disclosed that a type I radiation regression pattern developed in 15 patients; type II, in one patient, and type III, in five patients. Nine patients had a regression pattern characterized by complete destruction of the tumor, the surrounding choroid, and all of the vessels in the area into which the plaque was inserted. This resulting white scar, corresponding to the sclerae only, was classified as a type IV radiation regression pattern. There was no evidence of tumor recurrence in patients with type IV regression patterns, with an average follow-up of 6.5 years, after receiving cobalt plaque therapy. Twenty-nine of these 30 patients had been unsuccessfully treated with at least one other modality (ie, light coagulation, cryotherapy, external beam radiation, or chemotherapy).

Author Affiliations
From the Department of Ophthalmology, New York Hospital-Cornell Medical Center, New York.

Footnotes
Accepted for publication Sept 10, 1982.

Reprint requests to 70 E 66th St, New York, NY 10021 (Dr Abramson).

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