Abstract
To the Editor.— It might be worth emphasizing that when evaluating the thyroid of a patient with previous head-and-neck irradiation, in the context of the high incidence of thyroid cancer in these patients (237:2089, 1977), persons treated with intranasopharyngeal radium or radon should be considered separately from those treated with external beam radiation. Whereas, for example, about 95% of the patients studied by Favus et al 1 received more than 700 R to the thyroid, patients that were treated with radon or radium probably received only 3 to 8 R to the thyroid. (This dose was calculated using the inverse square law, 2 a distance from applicator to thyroid of 10 cm, a dose of radium of 33 to 100 mg-hours, 3 and 8.25 R/hr at 1 cm as the radiation emitted by 1 mg of radium.) This relatively small dose of radiation to the thyroid is less than the
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: JAMA: The Journal of the American Medical Association
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
