Presentation
Headaches. Incidental finding.
Patient Data
Age: 50 years
Gender: Female
From the case:
Quadrigeminal cistern lipoma
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Small well-defined lesion in the quadrigeminal cistern of left paramedian location, eliciting a high intensity on T1, T2 and FLAIR with blooming artifact on GE and loss of signal on axial T1 fat saturation.
Small vessel ischemic changes are noted.
Case Discussion
MRI features characteristic of a quadrigeminal cistern lipoma.
Quadrigeminal cistern lipomas are usually asymptomatic and found incidentally. Rarely do they cause mass effect resulting in seizures or hydrocephalus.
The differential diagnosis should include:
- subarachnoid hemorrhage: gradient-echo and fat-saturated sequences are the best sequences to differentiate it from a lipoma
- intracranial fat-containing lesions: refer to the article intracranial lipoma