Bracket sign (pericallosal lipoma)

Last revised by Mostafa Elfeky on 25 Mar 2021

The bracket sign refers to a radiographic appearance seen with the tubulonodular variety of pericallosal lipoma. It reflects calcification seen at the periphery of the midline lipoma. It is best seen on coronal imaging and historically was identified on frontal radiographs.

It should not be confused with the bracket sign of the pars marginalis

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