A 24-year-old woman of Greek background is found to have abnormal results on a pre-employment blood count. She feels well, her periods are not heavy, and she recalls her father being told he had a mild anaemia his whole life that never needed treatment. Investigations show haemoglobin 108 g/L (115–165), mean corpuscular volume 63 fL (80–100), red cell count 5.9 x 10^12/L (3.8–5.8) and serum ferritin 88 microg/L (30–300). Which one of the following is the most likely diagnosis?
Keep going — a set of ten like this one, one at a time.
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