Lentiform fork sign (basal ganglia)

Last revised by Dr Ahmed Abdrabou on 22 Jan 2019

The lentiform fork sign has been described on MRI and is seen as bilateral symmetrical hyperintensities in the basal ganglia surrounded by a hyperintense rim delineating the lentiform nucleus.

It has been postulated to result from metabolic acidosis due to any cause 1, e.g. end stage renal disease.

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Cases and figures

  • Case 1: uremic encephalopathy
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  • Case 2
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