Anatomic intracranial hemorrhage classification | ECASS type | Description |
1 | Hemorrhagic transformation of infarcted brain tissue | |
1a | HI1 | Scattered small petechiae, no mass effect |
1b | HI2 | Confluent petechiae, no mass effect |
1c | PH1 | Hematoma within infarcted tissue, occupying <30%, no substantive mass effect |
2 | Intracerebral hemorrhage within and beyond infarcted brain tissue | |
PH2 | Hematoma occupying 30% or more of the infarcted tissue, with obvious mass effect | |
3 | Intracerebral hemorrhage outside the infarcted brain tissue or intracranial-extracerebral hemorrhage | |
3a | Parenchymal hematoma remote from infarcted brain tissue | |
3b | Intraventricular hemorrhage | |
3c | Subarachnoid hemorrhage | |
3d | Subdural hemorrhage |
HI, hemorrhagic infarction; PH, parenchymatous hematoma.