Lumbar Disc Herniation L4-L5

Patient presents with a 3-month history of progressive lower back pain radiating down the left posterolateral thigh, calf, and dorsum of the foot. Pain is sharp, shooting, aggravated by sitting, coughing, and spinal flexion (VAS 8/10). Partially relieved by recumbent posture with knee flexion. Experienced progressive weakness in left ankle dorsiflexion and hallux extension over the past 3 weeks.