Intracranial hematomas are accumulations of blood within the brain or between the brain and the skull. An intracranial hematoma may occur because the fluid that surrounds your brain can't absorb the force of a sudden blow or a quick stop. The cause of intracranial bleeding (hemorrhage) usually is a head injury, often resulting from automobile, motorcycle or bicycle accidents, falls, assaults, and sports injuries.
Symptoms may include a persistent headache, drowsiness, confusion, memory changes, paralysis on the opposite side of the body, speech or language impairment, and other symptoms depending on which area of the brain is damaged. Some hematomas don't need to be removed because they're small and produce no signs or symptoms. But because signs and symptoms may appear or worsen days or weeks after the injury, if you don't have surgery, you may have to be watched for neurological changes, have your intracranial pressure monitored and undergo repeated head CT scans.
Seven hundred one patients with new stroke or transient ischemic attack were ascertained (485 first-ever stroke patients, 83 recurrent stroke patients, 133 first-ever transient ischemic attack patients). Crude frequency rates (all rates per 1000 person-years) were: 1.65 (95% CI, 1.5–1.79; first-ever stroke), 0.28 (95% CI, 0.22–0.35; recurrent stroke), and 0.45 (95% CI, 0.37–0.53; first-ever transient ischemic attack). Age-adjusted stroke rates were higher than those in 9 other recent population-based samples from high-income countries. High rates of subtype-specific risk factors were observed (atrial fibrillation, 31.3% and smoking, 29.1% in ischemic stroke; warfarin use, 21.2% in primary intracerebral hemorrhage; smoking, 53.9% in subarachnoid hemorrhage; P<0.01 for all compared with other subtypes). Compared with recent studies, 28-day case-fatality rates for primary intracerebral hemorrhage (41%; 95% CI, 29.2%–54.1%) and subarachnoid hemorrhage (46%; 95% CI, 28.8%–64.5%) were greater in Dublin.