Causes of hemorrhage can be
- Hypertensive ICB
- Lobar hemorrhage
- Traumatic ICB
- Hemorrhagic neoplasm
Unenhanced MRI is done. What does it show?
Hyperintense rim with an isointense center:
- This is not a ring enhancing lesion because ring enhancing lesion is ONLY applied when contrast is given.
- Patient has hematoma with different blood ages in the lesion (hyperintense = subacute, isointense = acute blood).
– In CT, the mass is hyperdense so the predominant blood age is acute
– This is acute hypertensive ICB.
Blood age in CT
Blood age in MRI
Learning point: Know the appearane of different blood age in MRi and CT.