Definition of Lobar intracerebral hemorrhage:

Lobar intracerebral hemorrhage is bleeding in the largest part of the brain called the cerebrum.

Causes, incidence, and risk factors:

Lobar intracerebral hemorrhage (ICH) may be caused by traumatic brain injury or blood vessel problems, such as aneurysm, arteriovenous malformation, or angioma, a type of blood vessel tumor.

When it is not caused by trauma, lobar intracerebral hemorrhage is considered a type of hemorrhagic stroke, the most serious type of stroke.

Lobar ICH is associated with the apolipoprotein (apo) E gene, which is linked to an increased risk for Alzheimer's disease.

Lobar hemorrhages are also associated with the following:

• Various blood or bleeding disorders, such as disseminated intravascular coagulation, hemophilia, sickle cell anemia, and leukemia.
• Decreased levels of blood platelets
• Use of aspirin or blood thinners
• Liver disease (associated with increased bleeding risk)
• Cerebral amyloid
• Some autoimmune disorders