So the neurologist is stumped as to why I've had a stroke at 35. All the blood work keeps coming back fine for autoimmune diseases. I had a CT of my head and chest and it came back clear other then a small lung nodule that the radiologist said did not look suspicious. The MRI came back with a small stroke. Considering the doctors can't figure out why I've had a stroke isn't it time to do a PET scan? After my history of melanoma I think it would be warranted. Thoughts?