MEDICAL BODY SCANS / SCIENCE PHOTO LIBRARY MEDICAL BODY SCANS / SCIENCE PHOTO LIBRARY
This axial (cross sectional) MRI image of the brain through the level of the brainstem reveals extensive edema and enlargement of the pons (greenish-blue) extending into the left (on your right) middle cerebellar peduncle. There is prominent ring enhancement on post contrast images. This represents a form of acute MS that can stimulate a tumor therefore it is referred to as tumefactive.
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