Because the first symptoms are often visual, posterior cortical atrophy can be misdiagnosed as a vision disorder. It’s important to see a neurologist or a neuro-ophthalmologist who can correctly diagnose your condition. A neurologist is trained in brain and nervous system conditions. A neuro-ophthalmologist specializes in neurology and conditions related to vision.
To diagnose posterior cortical atrophy, a specialist will review your medical history and symptoms. This includes vision problems. The specialist also will conduct a physical exam and a neurological exam.
Several tests may help diagnose your condition. The tests also might rule out other conditions that may cause similar symptoms. The tests might include:
- Mental status and neuropsychological tests. You will be asked questions and will have tests to assess your cognitive skills. You also may be assessed for depression or other mental disorders.
- Blood tests. Your blood may be tested for vitamin deficiency, thyroid disorders and other conditions that may be causing your symptoms.
- Ophthalmology exam. A vision test can determine whether another condition such as a problem within your eyes is causing your vision symptoms.
- Magnetic resonance imaging (MRI). An MRI machine uses powerful radio waves and a magnetic field to create a 3D view of your brain. In this test, your health care provider can view changes in your brain that may be causing your symptoms.
- Fluorodeoxyglucose (FDG) PET imaging or single-photon emission computerized tomography (SPECT). In these tests, a small amount of radioactive material is injected into a vein. Images are taken using a large machine. You’ll lie on a padded table that slides into the part of the machine that looks like a doughnut hole. PET provides visual images of brain activity. SPECT measures blood flow to regions of the brain.
- Spinal fluid test. This test involves removing a small amount of the fluid that cushions the brain and spinal cord. This test can measure amyloid and tau proteins that are the hallmark of Alzheimer’s disease.
