The investigators design a retrospective, observational cohort study to provide contemporary information on the prevalence, characteristics, risk stratification，cost-effective, treatments and prognosis of Chinese hospitalized adult patients with intracerebral hemorrhage.

Intracerebral hemorrhage (ICH) remains a devastating disease with high mortality, yet few therapeutic managements have been proved effective. Large quantities of work needs to be done to fully delineate the prevalence and prognosis of ICH. Hence, the investigators design a prospective, observational cohort study to provide contemporary information on the prevalence, characteristics, risk stratification，cost-effective, treatments and prognosis of Chinese hospitalised adult patients with ICH.

Inclusion Criteria:

• Hospitalized patients over 18 years old of primary intracerebral hemorrhage.

Exclusion Criteria:

1. patients of secondary intracerebral hemorrhage，such as hemorrhagic transformation of ischemic stroke, aneurysmal, cavernomas, arterio- venous malformations, central venous thrombosis, trauma-related, or tumor
2. isolated intraventricular hemorrhage or subarachnoid hemorrhage pregnant patients
3. unavailability to get complete blood cell samples and presenting contraindications or refusal to MRI
4. patients cannot be followed up for any reasons.
5. patients death in 24 hours
6. pregnant patients
7. surgical evacuation of hematoma

Hospitalized patients over 18 years old with primary intrcerebral hemorrhage will be enrolled consecutively.