Microcytic anaemia can 'mask' co-existing cobalamin deficiency.
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D018798:Anemia, Iron-Deficiency / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005756:Gastritis / Q000150:complications* / Q000382:microbiology; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori; D006801:Humans; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis* / Q000209:etiology