Discussion Findings - Large acute subdural hematoma - Subarachnoid hemorrhage - Uncal and subfalcine herniation - Lobular contrast colle...
Discussion
Findings
- Large acute subdural hematoma
- Subarachnoid hemorrhage
- Uncal and subfalcine herniation
- Lobular contrast collection
Differential
- Ruptured pseudoaneurysm, likely mycotic
- Ruptured aneurysm
- Arteriovenous malformation
- Trauma
- Nonaccidental trauma
Ruptured pseudoaneurysm
• Focally dilated arterial segment, not contained by all layers of the arterial wall
• Causes
- Trauma
- Infection (endocarditis in this case)
- Inflammation
• Atypical location
• Irregularly shaped
• Very rarely result in acute subdural hematoma
- Arachnoid tear may be adherent to aneurysm
- Jet effect may tear arachnoid
