Autosomal Dominant Porencephaly Type I
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Autosomal Dominant Porencephaly Type I is not the name you expected.
Autosomal dominant porencephaly type I is a rare genetic disorder in which fluid-filled cysts and cavities develop on the surface of the brain. Autosomal dominant porencephaly type I is caused by mutations of the COL4A1 gene. Affected individuals are predisposed to damage to small blood vessels, including the small vessels within the brain. The signs and symptoms of this disorder vary greatly from one individual to another, but may include weakness or paralysis of one side of the body (hemiparesis or hemiplegia), seizures, varying degrees of cognitive impairment, and migraines.
Mutations of the COL4A1 gene also cause at least two other disorders - brain small vessel disease with hemorrhage and HANAC (hereditary angiopathy with neuropathy, aneurysms, and muscle cramps) syndrome. Researchers now know that these three disorders represent a spectrum or continuum of disease with overlapping features.
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Last Updated: 12/7/1969
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