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CASE 5: Explanation of Imaging Findings
MRI without and with contrast
A brain MRI without and with contrast was performed. Select images are shown.
Questions
1. What are the above sequences?
2. Where is the abnormality located?
3. Describe the abnormality using appropriate terminology.
4. Why are the lateral ventricles enlarged?
- The mass is compressing the 4th ventricle (yellow arrow). Because of this compression it is causing obstruction of CSF flow. The lateral and third ventricles are enlarged as a result
5. What is the differential diagnosis for this abnormality?
6. Is this an example of communicating or non-communicating hydrocephalus?
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