What causes Hereditary cerebral hemorrhage with amyloidosis ?
What causes hereditary cerebral hemorrhage with amyloidosis - Dutch type? The clinical symptoms of hereditary cerebral hemorrhage with amyloidosis - Dutch type are caused by the build-up of a protein called amyloid within the arterial walls of the brain. This protein build-up causes bleeding into the brain. The symptoms occur because bleeding in the brain harms brain tissue. Hereditary cerebral hemorrhage with amyloidosis-Dutch type is an autosomal dominant disorder with complete penetrance (all individuals who inherit the mutated gene will develop the condition). The likely genetic defect is in the amyloid protein precursor protein (APP) gene on chromosome 21.