What is the role of CT scanning and MRI in the workup of lead toxicity?

Updated: Jan 16, 2020
  • Author: Pranay Kathuria, MD, FACP, FASN, FNKF; Chief Editor: Tarakad S Ramachandran, MBBS, MBA, MPH, FAAN, FACP, FAHA, FRCP, FRCPC, FRS, LRCP, MRCP, MRCS  more...
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Answer

In general, neuroimaging (eg, with magnetic resonance imaging [MRI] or computed tomography [CT]) does not play an important role in the diagnosis of lead poisoning. However, cerebral edema and microhemorrhages may be seen in patients presenting with acute encephalopathy on both CT and MRI. With chronic exposure to lead, patchy calcifications may be seen. Atrophy and white matter changes may be present with chronic exposures.

Atre et al reported a case of lead encephalopathy with MRI findings of symmetric occipital lobe lesions that were bright on T2-weighted and fluid-attenuated inversion recovery images and hypointense on T1-weighted images. [29] These lesions disappeared after chelation therapy with clinical laboratory improvement.


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