Both of my parents' death certificates cited the cause of death as organic brain disease, which basically means dementia. They each had dementia, though each of them suffered from a significantly different type. Dad's was dramatic. It was the result of surgery that was supposed to prevent the mental decline he would eventually suffer as a result of a World War II brain injury. Something went wrong in the surgery, and he came out of that surgery totally demented.
Read more about dementia as a cause of death:
Both of my parents' death certificates cited the cause of death as organic brain disease, which basically means dementia. They each had dementia, though each of them suffered from a significantly different type. Dad's was dramatic. It was the result of surgery that was supposed to prevent the mental decline he would eventually suffer as a result of a World War II brain injury. Something went wrong in the surgery, and he came out of that surgery totally demented.
Read more about dementia as a cause of death: