An athletic young woman notices that she cannot move her left knee as well as she used to move it, and that she is having trouble skiing. An orthopedist finds nothing wrong with the joint. A magnetic resonance image of the brain demonstrates a single enhancing lesion in the brain. From the data presented, the most likely reason this patient does not have multiple sclerosis is:

Question

Quizplus · Accepted Answer

Multiple sclerosis, by definition, is a demyelinating brain disease affecting more than one area of the brain. This patient may later develop other areas of demyelination, but at this time the evidence presented is inadequate to make that diagnosis. MS can affect both motor and sensory function, and it can impact movement in the limbs. It is not a common cause of headache, so the lack of headache is not a helpful finding.

An Athletic Young Woman Notices That She Cannot Move Her