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Assessment of iron status and the role for iron-replacement therapy in anaemic cancer patients under the care of a specialist palliative care unit

Anaemia is common in advanced cancer, may develop for several reasons, and is not always symptomatic. Our observations of the seemingly indiscriminate prescription of iron-replacement therapy (IRT) for anaemic palliative care patients, and our practice of discontinuing IRT in patients with normal red-cell indices, prompted a study to determine (1) the prevalence of anaemia in our patients, (2) what proportion had iron deficiency, (3) the prevalence and benefits of IRT and (4) the prevalence of side effects attributable to IRT. The prevalence of anaemia was 65%. We found a 9% prevalence of iron deficiency, and suggestive but inconclusive evidence of iron deficiency in a further 41%, but only three (27%) of these patients had typical iron deficiency red-cell indices. Only two patients within the study population were taking IRT. Haemoglobin increased significantly in one, but fell in the other, and both experienced side effects attributable to iron. IRT should neither be indiscriminately prescribed nor withheld for anaemic palliative care patients, and the decision should not be based on red-cell indices alone. When symptomatic anaemia is found in patients whose general condition indicates that IRT would be acceptable, iron status should be fully assessed. A therapeutic trial of IRT may be justified where ferritin is elevated, but other parameters suggest iron deficiency.