<unk>  angiography and magnetic resonance imaging, family medical history, symptoms, a complete physical examination, and ultimately biopsy of the brain, are often required for the diagnosis. Also, many lab tests must be done for the diagnosis; tests may reveal anemia (a shortage of red blood cells), a high white blood cell count, a high platelet count, allergic reactions, immune complexes, antibodies (tools the body uses to fight off threats) and elevation of inflammatory markers. Another crucial part in the diagnosis of<unk>  is the use of imaging techniques. Techniques such as conventional digital subtraction angiography (DSA) and magnetic resonance imaging (MRI) are used to find and monitor<unk>  involvement.
Cerebral vasculitis
Infectious intracranial aneurysm
Cerebral atherosclerosis
Meningism
Giant cell arteritis
Cerebral amyloid angiopathy
Intracranial aneurysm
Cerebral vasospasm