Tectal plate lipoma

Case contributed by Dr Wael Nemattalla

A focal region of fat is demonstrated in the quadrigeminal (tectal plate) cistern consistent with a lipoma.

Case Discussion

Lipomas are easily identified on CT but may also be mistaken for CSF or air depending on the windowing values. They typically have Hounsfield values between -20 to -100 HU (depending on size / partial voluming).
CSF would have values close to 0 HU while air would be below -800 HU.

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Case information

rID: 7973
Published: 25th Dec 2009
Last edited: 13th Aug 2019
Inclusion in quiz mode: Included

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