Bilateral Foot Drop Caused by Acute-onset Neuropathy after Diabetic Ketoacidosis: Successful Management and Long-term Follow-up for Employment.

Background: Peripheral neuropathy is a common complication of diabetes, impacting many patients with type 1 or 2 diabetes. Acute-onset peripheral neuropathy after diabetic ketoacidosis (DKA) is rare yet serious, and reports on long-term functional outcomes and rehabilitation for this condition are limited. We present a case of bilateral foot drop caused by acute-onset peripheral neuropathy following DKA. The case was effectively managed through prompt and continuous intervention.

Case: A 21-year-old male university student with no notable medical history who was seeking employment presented with impaired consciousness. DKA associated with type 1 diabetes was diagnosed. As blood glucose and acidosis improved, he rapidly regained consciousness. On Day 3 post-onset, bilateral foot drop and lower leg sensory impairment emerged, with nerve conduction studies indicating lower extremity peripheral neuropathy on Day 8. Improvement during hospitalization was modest, so ankle-foot orthoses were prescribed on Day 10. He could walk independently with the orthoses on Day 12 and was discharged home on Day 15. Outpatient follow-up was continued to support the patient's efforts to gain employment. Needle electromyography in the tibialis anterior muscles bilaterally showed denervation at 2 months and polyphasic potentials at 8 months. In the 2 years post-onset, bilateral lower limb muscle strength progressively improved, and the patient successfully secured clerical employment.

Discussion: Successful rehabilitation for employment was achieved in the rare condition of acute-onset neuropathy after DKA through effective management based on early orthotic prescription, clinical and electrophysiological examinations, and continuous follow-up.