title: Vitamin B12 deficiency presenting as pancytopenia with ring sideroblasts.
authors: Vighnesh
authors: V
authors: Bharath
authors: Cyrus C
authors: CC
authors: Hsia
mesh_terms: D001792:Blood Platelets / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006801:Humans; D007962:Leukocytes / Q000378:metabolism / Q000473:pathology*; D008875:Middle Aged; D010198:Pancytopenia / Q000097:blood / Q000150:complications / Q000188:drug therapy / Q000473:pathology*; D012156:Reticulocytes / Q000378:metabolism / Q000473:pathology*; D014806:Vitamin B 12 Deficiency / Q000097:blood / Q000150:complications / Q000188:drug therapy / Q000473:pathology*