MediumHaematologyVitamin B12 deficiency with neuropathyau-amcau-racp
A 58-year-old woman presents with progressive numbness in her hands and gait unsteadiness. Examination reveals impaired vibration and joint position sense in the lower limbs, positive Romberg sign and brisk reflexes. She is pale. Hb is 85 g/L with macrocytosis; serum B12 is very low. What is the most appropriate treatment?