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May 11, 1957


JAMA. 1957;164(2):205. doi:10.1001/jama.1957.02980020085026

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To the Editor:—  Dr. Algernon B. Reese has referred to me, as one of the radiotherapists now participating in a project to evaluate the combined effect of triethylene melamine and radiotherapy in the treatment of retinoblastoma, the letter requesting greater detail concerning the technique of radiation employed in this study.The following method is applicable only to those patients with bilateral tumors who have had one eye removed, and where there is no evidence of tumor invasion of the optic nerve of the enucleated eye. On the fifth to seventh day after enucleation, external irradiation to the remaining eye is instituted. A contour of the head is obtained and a plan is drawn up with reference to the estimated area of interest, i. e., the entire globe posterior to the lens to include at least 1 cm. of the optic nerve. Two portals are used. The nasal portal measures 2.0-2.5

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