Colloid cyst with anterior communicating artery aneurysm

Case contributed by Dr Amro Omar



Patient Data

Age: 40 years
  • oval hyperdense mass at foramen of Monro consistent with a small colloid cyst
  • old lacunar infarction of left frontal lobe
  • vague hyperdensity along the inferior longitudinal superior fissure, near the superior temporal gyrus, is suspected to represent an anterior communicating artery (ACOM) aneurysm

MRI/MRA confirmed the CT findings of left ACOM aneurysm.

Mass at the foramen of Monro is T1 isointense / T2 hypointense and non-enhancing, consistent with colloid cyst.

Again noted, the old lacuna infarction in the left anterior corona radiate with encephalomalacia.

Case Discussion

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Case information

rID: 33901
Published: 29th Jan 2015
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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