Abstract
To the Editor: —InThe Journal, November 8, I note a short article by Dr. R. H. Rulison on this subject, reporting a case of senile keratosis of the face suggesting malignant degeneration which he treated by giving a dose of roentgen ray with the following setting: 8 inch spark gap, 5 milliamperes of current, 10 inch distance and 3.9 minutes of time. He states that he made a mistake and omitted the filter, and that the total skin dose that he administered was 4⅓ skin units, which, he says, was sufficient to cause a severe burn of the skin when passing through a 1 inch opening in a lead screen. He then goes on to state that by the use of the Kromayer lamp in this case, giving treatment every day or so for about two weeks after the above dose had been given, he was able to prevent
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