My Niece's Husband Is Having An Acute Onset Of An

My niece's husband is having an acute onset of an array of neurological symptomdps such as dizziness, numbness in his left pinky and ring fingers and weakness in his right leg. He has been in the hospital for a week, now, undergoing multiple scans and tests. So far, the only things that have discovered is elevated cholesterol, high triglycerides and liver enzymes. The neurologist keeps stating he doesn't know what's going on. My niece and her husband are frustrated. Any thoughts?