Presentation
Headache. Previously reported "intracranial lipoma".
Patient Data
Ovoidal hyperintense structure on T2W images in anterior cranial fossa, between the olfactory sulci. It demonstrates a drop of signal on T2W fat-saturated images.
The lesion found on MRI demonstrates an outer thin bony layer on CT images.
Case Discussion
The crista galli is a median bony structure of the anterior cranial fossa. The function is to give attach to the anterior edge of the falx cerebri.
Mostly is a very thin structure, but sometimes it can be thicker, with pneumatization or the presence of fat-like tissue, like in this case. This tissue corresponds to fatty bone marrow.
It is important to recognize this anatomical variant, to avoid false pathological descriptions (e.g. lipoma).