Vitamin B12 deficiency following total gastrectomy.
D013505:Digestive System Surgical Procedures; D005743:Gastrectomy; D006801:Humans; D013270:Stomach / Q000601:surgery*; D014806:Vitamin B 12 Deficiency / Q000209:etiology*
STOMACH/surgery; VITAMIN B12 DEFICIENCY/etiology and pathogenesis