Hereditary cerebral hemorrhage with amyloidosis, Flemish type (Orphanet rare-disease nomenclature id Orphanet_324718) can be described as follows. Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Flemish type is a form of HCHWA (see this term) characterized by an age of onset of 45 years of age, progressive Alzheimer's disease-like dementia and lobar intracerebral hemorrhage in some patients. Also known as: HCHWA, Flemish type.