Severe hyperferremia and hyperferritinemia in a dog with precursor‐directed immune‐mediated anemia

A 4‐year‐old dog was evaluated at the Colorado State University Veterinary Teaching Hospital for lethargy and hyporexia of 24 hours duration. On presentation, she had a marked normocytic, normochromic, nonregenerative anemia (HCT 14%; RI 40–55). Her serum iron concentration (1651 μg/dL; RI 73–245) and serum ferritin concentration (1337 ng/mL; RI 89–489) were markedly elevated. Bone marrow aspirate and core biopsy were consistent with a diagnosis of precursor‐directed immune‐mediate anemia. To the authors' knowledge, these are the highest reported serum iron and ferritin concentrations in a patient with precursor‐directed immune‐mediate anemia. The iron concentration improved significantly after treatment, supporting the theory that the hyperferremia was due to hemolysis and ineffective erythropoiesis.