Could amyloidosis be wrongly diagnosed as alzheimer's disease?

Possibly, not likely. Amyloidosis is a disease that occurs when abnormal substances called amyloid proteins build up in your organs. It is believed that a contributor to alzheimer's disease is the buildup of beta-amyloid. These would be 2 different situations --- amyloidosis effecting the brain & alzheimer's. Unfortunately you could still be dealing with a dementia in either case.
Unclear . Part of the pathology underlying alzheimer's is the deposition of a misfolded protein, an amyloid plaque. Hereditary amyloidosis is a disease mainly sparing brain and spinal cord. With aging amyloid can be deposited into arteries in the brain, which can burst and cause hemorrhage. Do not understand why there should be any confusion in diagnosis.

Related Questions

Could amyloidosis be mistaken for alzheimer's disease?

Not usually. There are many different types of amyeloid. Amyloidosis is an illness caused by the abnormal deposits of amyloid in various tissues. In general this is not thought to occur in the brain. The brains of thsoe with alzheimers disease have plaques with beta-amyeloid. It would be pretty unlikely that these 2 illnesses would be confused. Read more...
Depends. Alzheimer's disease may be considered to be amyloidosis of the brain. There is also peripheral amyloidosis that affects the heart and other organs but is caused by deposition of a different amyloid. Read more...