FCEM2-1026

FCEM2-1026

A 35-year-old woman presents to the Emergency Department complaining of lower back pain and numbness in both feet. Three days ago, she experienced a sharp, shooting pain in her back after lifting a heavy object at work. The pain has worsened over the past three days, and she has now developed weakness in her right leg. She is also experiencing difficulty with urination. Her medical history includes a previous laminectomy for a herniated lumbar disc four years ago. During the examination, normal power is observed in her left leg, but reduced power is noted in the right leg. Motor strength is reduced to 3 out of 5 in the hamstrings, 2 out of 5 in the ankle and toe plantar flexors, and 0 out of 5 in the ankle dorsiflexors and extensor hallucis longus. The right ankle and Achilles tendon reflexes are absent. Sensory examination reveals reduced sensation in the right calf, right foot, labia, and perianal area. Rectal examination reveals reduced sphincter tone.

What is the SINGLE most likely diagnosis?