A 50-year-old man presents with progressive bilateral peripheral numbness, loss of vibration, pinprick, and pain sensation
A 50-year-old man presents with progressive bilateral peripheral numbness, loss of vibration, pinprick, and pain sensation up to the ankles bilaterally and to the wrist in the upper limbs. History includes alcohol excess and a recent fracture of his left 5th toe. His BMI is 30. Routine bloods are unremarkable except for slightly low haemoglobin, low calcium, and low magnesium. ALT and ALP are slightly raised with slightly low platelets.
Select the SINGLE most appropriate cause of the symptoms from the list below. Select ONE option only.
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