A patient with prescription to evaluate and treat status post left knee sprain reports left leg weakness, vertigo, visual disturbances, paresthesias in the legs, fatigue, and urinary bladder disturbances. Which condition is MOST consistent?

• A. Lyme disease
• B. Parkinson's disease
• C. Multiple sclerosis
• D. Rheumatoid arthritis

Answer: (C)

This pattern points to a central nervous system process rather than a localized knee injury. Multiple sclerosis commonly presents with a mix of neurologic deficits that can involve different CNS areas, such as the optic pathways, brainstem/cerebellum, and the spinal cord. Vision changes reflect optic neuritis; vertigo and balance/coordination issues suggest brainstem or cerebellar involvement; leg weakness and paresthesias arise from spinal cord lesions; bladder dysfunction results from disruption of spinal autonomic control. Fatigue is also a frequent feature. The combination of vision disturbance, vertigo, sensory changes in the legs, weakness, and bladder issues is highly characteristic of MS rather than a simple musculoskeletal problem.

Lyme disease can cause neurologic symptoms, but the full pattern described—especially the bladder disturbance and the specific mix of optic, brainstem/cerebellar, and spinal signs—fits multiple sclerosis more closely. Parkinson's disease centers on motor symptoms like tremor and bradykinesia without this widespread sensory and autonomic involvement, and rheumatoid arthritis is primarily joint-focused.

So the presentation is most consistent with multiple sclerosis.