title: 79-year-old woman with forgetfulness.
authors.affiliation: Mayo School of Graduate Medical Education, Mayo Clinic, Jacksonville, FL 32224, USA. palmer.william@mayo.edu
authors.forename: William C
authors.initials: WC
authors.lastname: Palmer
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Crozier
authors.forename: Olga M
authors.initials: OM
authors.lastname: Petrucelli
mesh_terms: D000368:Aged; D002276:Carcinoid Tumor / Q000150:complications / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008569:Memory Disorders / Q000209:etiology*; D013274:Stomach Neoplasms / Q000150:complications / Q000175:diagnosis*; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis* / Q000209:etiology
chemical_list: D014805:Vitamin B 12