Problem:
A 38-year-old previously healthy man presents with weakness of his right leg. He is frustrated that his leg weakness is interfering with his job as a well-paid salesman, which he enjoys very much. He has no other complaints, except he is experiencing stress due to the declining health of an elderly parent living with him at home. On examination, he has a positive Hoover sign. Laboratory evaluation and a brain MRI are normal. Which one of the following is the most likely diagnosis? A. Conversion disorder, B. Factitious disorder, C. Malingering, D. Multiple sclerosis