Intracranial venous malformations are abnormally enlarged veins in brain. Venous malformations are a type of blood vessel abnormality in the brain or spinal cord.
The crude detection rate was calculated cumulatively for 1999 and 2000 as the proportion of the adult (aged 16 years) mid-year population estimate for Scotland that was detected as having an IVM during that year. Ideally, the detection rate calculation should remove prevalent people from the denominator. We could not do this because the prevalence of all IVMs has not yet been estimated accurately, 9,14 although we have recently estimated the point prevalence of brain AVMs. 13 However, the number of prevalent people is likely to be so small as to make a negligible impact on our detection rates. We calculated 95% CIs around detection rate estimates according to the Poisson distribution. 24 Age-standardized detection rate esti- mates were directly age-adjusted to the last census in Great Britain in 1991 (http://www.census.ac.uk) and the last census in the United States in 2000.
The most important goal AVM treatment is to prevent internal bleeding from rupture, because which can lead to stroke / death. However, seizure control or stabilization of progressive neurological deficits are occasionally treatment goals. Though medication may be prescribed, it does not cure AVMs but medications are used to control pain and seizures. The management options for brain AVMs include observation or various treatment techniques, such as endovascular embolization, microsurgical techniques and stereotactic radiotherapy used alone or in combination with varying degrees of treatment-associated morbidity and mortality.