An 18 year old girl presents with paresthesia of both lower limbs, which progressed into weakness and difficulty in walking over a period of 3 days. There was no bladder or bowel incontinence, or a history of trauma. She experienced an upper respiratory tract infection 3 weeks earlier. Her medical history is unremarkable.
Negative for poliovirus
Appearance: clear Polymorphs: nil (< 5) Gram stain: negative Glucose: 70 mg/dL (50 - 80) Protein: 50 mg/dL (15 mg/dl - 60 mg/dl)
Nerve conduction studies of both lower limbs are normal.
Na+: 137 mEq/l (135 - 145) K+: 4.2 mEq/l (3.5 - 5.5) Cl-: 101 mEq/l (97 - 105)