In terms of psychiatric history, he was diagnosed with bipolar depression 8 years ago, and has since been effectively treated with valproic acid and venlafaxine. Serum valproic acid level is within the therapeutic range.
What work-up would you order? What diagnosis or differential diagnosis are you considering?
"Treated with a mood stabilizer, he becomes incontinent and walks oddly" by Kumari S, Sridhar R, and Rao M (Current Psychiatry).