Pernicious anemia presenting as pancytopenia.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2021 The Authors. eJHaem published by British Society for Haematology and JohnWiley & Sons Ltd. exertion and at rest. His symptoms had progressively worsened for the past 3 months with associated right-sided headaches relieved with NSAIDS, epigastric pain and an episode of black stool. He drinks alcohol socially and denied use of nitrous oxide. His vital signs were stable, and examination was benign with no rash, hepatosplenomegaly