A 67-year-old man with a history of terminal ileal resection presents with progressive numbness in his feet and gait instability over 3 months. Vital signs: BP 138/82, HR 88, RR 16, Temp 37°C, SpO2 98%. Examination reveals decreased vibration sense in both feet and bilateral Babinski signs. Serum vitamin B12 level is 185 pg/mL. Cranial nerves are intact. Which of the following is the most likely diagnosis?
- A)Transverse myelitis
- B)Subacute combined degenerationGABARITO
- C)Guillain Barré syndrome
- D)Amyotrophic lateral sclerosis
- E)Multiple sclerosis
Explicação
Combined dorsal column dysfunction and corticospinal tract signs in a patient at risk for vitamin B12 deficiency indicate subacute combined degeneration. Demyelination of these tracts causes sensory ataxia plus upper motor neuron findings. Ver explicação completa e trilha adaptativa →