Iron Deficiency Activating Latent Pernicious Anaemia

A 48-year-old woman developed anaemia with evidence of both iron and vitamin B₁₂ deficiencies. These deficits were corrected following treatment with ferrous sulfate and ascorbic acid. Subsequently, she was found to have latent pernicious anaemia. It is suggested that iron deficiency may play a role in the development of vitamin B₁₂ deficiency in certain patients with latent pernicious anaemia.