Radiology, Vol 183, 111-114, Copyright © 1992 by Radiological Society of North America

ARTICLES

Delayed reactions to contrast media after interleukin-2 immunotherapy

PL Choyke, DL Miller, MT Lotze, JM Whiteis, B Ebbitt and SA Rosenberg
Diagnostic Radiology Department, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.

A prospective study was conducted by means of a questionnaire to determine the prevalence of delayed reactions to contrast media administered intravenously (iopamidol) and orally (diatrizoate sodium) in 170 patients who had received interleukin-2 (IL-2) and in 631 patients who did not. Another control group of 100 non-IL-2 patients received only oral contrast medium. Delayed reactions (eg, fever rash, flulike symptoms, joint pain, flushing, pruritus, and dizziness) were reported in 3.9% (25 of 631) of non-IL-2 patients and in 11.8% (20 of 170) of IL-2 patients. Reactions were mild in the non-IL-2 patients but were more severe in the IL-2 patients. Two IL-2 patients required hospitalization. Only rash, flulike symptoms, and pruritus were statistically more common in IL-2 patients than in non-IL-2 patients. The prevalence of delayed reactions to nonionic contrast medium is higher in patients who have received IL-2 than in the general population. Most delayed reactions do not require therapy, but, when necessary, therapy is usually limited to relief of symptoms.

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