. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . he treat-ment is painless, and nothing further is required but to cover the partwith a simple antiseptic dressing. It is, of course, too early to sayanything as to the permanence of the cures in these cases, but I hope 1 British Medical Journal, February 9, 1901, pp. 332-334. THERAPEUTIC USES OF THE X-RAYS 439 to be able to make a further communication upon the subject with par-ticular reference to the histological changes. The immediate result is


. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . he treat-ment is painless, and nothing further is required but to cover the partwith a simple antiseptic dressing. It is, of course, too early to sayanything as to the permanence of the cures in these cases, but I hope 1 British Medical Journal, February 9, 1901, pp. 332-334. THERAPEUTIC USES OF THE X-RAYS 439 to be able to make a further communication upon the subject with par-ticular reference to the histological changes. The immediate result isall that can be wished for, and I feel justified in recommending the useof the X-rays, at least in the cases in which complete removal by theknife is impracticable. From among my cases of rodent ulcer I will choose two as examplesof the excellent results which this method of treatment gives. Case I. J. H., a man seventy years old. Referred to me byDr. M. F. Gavin. The growth — a small specimen from which wasexamined microscopically by Dr. Mallory, and found to be a carcinomaof the rodent ulcer type—began fifteen years ago. There was a red. Fig. 239. J. H. Rodent ulcer before treatment by the X-rays. and somewhat swollen annular area, about i centimetre wide, sur-rounding the ulcer. The exposures were made at a distance of 12 centimetres fromthe target, and were from three to five minutes duration daily, exceptSundays during the first four weeks. Twenty-four hours after the firstexposure, which lasted five minutes, a shrinking and slight puckeringof the swollen ring around the ulcer was noticed. After three ex-posures, of three minutes each, the redness and swelling of this ringhad diminished. After six exposures, there was likewise, by measure-ment, a slight diminution in the size of the ulcer. The order of healing seems to be as follows : the ulcer heals up 440 THE ROENTGEN RAYS IN MEDICINE AND SURGI from the bottom, and then afterward closes over. This closing in ofthe su


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