LIVING ART ENTERPRISES, LLC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY LIVING ART ENTERPRISES, LLC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
This sagittal (from the side) T1 weighted MR image with contrast shows a well circumscribed ovoid hyperintense lesion at the foramen of Monro attached to the septum pellucidum. This represents a benign lesion called a Colloid Cyst. There is little to no enhancement. These can cause intermittent hydrocephalus when blocking the foramen and have been reported to cause sudden death in the setting a acute hydrocephalus.
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