Today would be the anniversary of my mother's birthday, but she's been dead for some time now. Alzheimer's killed her. She lost the ability to swallow, so she couldn't eat or drink. Since she had left an advance health care directive that no feeding tubes would be used, essentially she starved to death. She was only 66. Mom was diagnosed with the disease when she was 52. She'd been having troubles for a good while before that, so hers was a very early onset. You lose people twice when they have Alzheimer's: once when their mind goes and they are no longer themselves, and then when the body finally dies. Early onset Alzheimer's may be genetic, and even dominant, according to a number of studies, such as this one. There are lots more studies, but many are very technical and not worthwhile to link here. Essentially, some forms of early Alzheimer's are inherited about 25% of the time. So my siblings and I have a big shadow lurking: which one of the four of us will be the one that develops the disease?