Figure 1

An example of partial AG. A 58-year-old woman with the chief complaint of a burning sensation on the tongue for six months. She was easily fatigued for several months and denied any systemic diseases. Her serum vitamin B12 level was 72 ng/L (normal range 180–914 ng/L) and serum levels of folate, ferritin and hemoglobin were all within the normal range. (A) Physical examination revealed partial atrophy of the tongue; (B) complete resolution after 1 month of supplement therapy; (C) the therapeutic effect was still evident during follow-up at 6 months.