A dye used in MRI (magnetic resonance imaging) and MRA (magnetic resonance angiography) scans has been linked to a rare and potentially fatal skin disease in some users.
The problem stems from the metal gadolinium found in the dyes injected into some patients before MRI scans and all patients before MRA scans.
The disease is known as nephrogenic systemic fibrosis or nephrogenic fibrosing dermopathy (NSF/NFD), and appears to only occur in patients with kidney disease who undergo an MRI or MRA where a gadolinium-based dye is used.