Anemia and hematinic deficiencies in gastric parietal cell antibody-positive and antibody-negative erosive oral lichen planus patients with thyroid antibody positivity

We conclude that serum GPCA is the major factor causing vitamin B12 deficiency, macrocytosis and pernicious anemia in GPCA+/TGA/TMA/EOLP patients. ELOP itself but not TGA/TMA positivity plays a significant role in causing anemia and hematinic deficiencies in GPCA−/TGA/TMA/EOLP patients.