MRI-enhancing agents need warning - U.S. FDA

WASHINGTON, May 23 (Reuters) - Contrast agents used to make magnetic resonance imaging, or MRI, scans easier to see should carry new, strong warnings, the U.S. Food and Drug Administration said on Wednesday.

The warning -- a "black box" -- would alert physicians that patients with certain kidney and liver conditions are at risk for a potentially fatal skin disease called nephrogenic systemic fibrosis, the agency said in a statement.

The condition triggers thickening of the skin, organs and other tissues that makes it difficult to move and can lead to broken bones, although the exact cause is unclear. There is no effective treatment.

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