What diseases cannot be detected by blood test?
Some blood tests are surprisingly inaccurate – and not all conditions are detected in blood samples and health check ups . Here are the six diseases which are not diagnosed by blood test. 1. DEMENTIA: It isn't your blood that reveals the game. It's your symptoms, plus the doctor asking you a few simple questions to assess your memory and mental capacity. Even then, it can be difficult to tell if you are suffering from dementia or simply having "senior moments," so you may be monitored over time to see if you are getting worse. 2. PARKINSON'S DISEASE: Again, the symptoms — shaking, stiffness, and general sluggishness — determine the diagnosis. A special scan may be used to confirm it, but blood tests will not. 3. MULTIPLE SCLEROSIS (MS): You will almost certainly have blood drawn, but this will be to rule out other problems that resemble MS. The final decision is based on your symptoms and specialized tests such as scans. 4. RHEUMATOID ARTHRITIS: A