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Miscellaneous Complications

Iron overload in bone marrow transplant recipients

Abstract

We examined the degree of hepatic iron overload in patients receiving marrow transplant for hematologic malignancy and evaluated a new method of morphometric analysis of marrow iron content as a means of estimating hepatic iron stores in these patients. The iron content of marrow and liver specimens from 10 consecutive patients who died between 50 and 100 days after transplant was determined by spectrophotometry. Their mean age was 34.9 years (range 10–59). The mean time to death from disease onset was 2.2 years (0.5–8.7). Patients had received 30.2 ± 17.4 units of red cells during the transplant period and 47.6 ± 25.9 red cell units from diagnosis to death. The median hepatic iron concentration (HIC) was 4307 μg/g dry weight (range 1832–13120; normal 530–900) and the median hepatic iron index (HIC (μmol/g dry weight/age (years)) was 3.85 (0.76–8.14). The median biochemical marrow iron content was 1999 μg/g dry weight (range 932–3942). Morphometric analysis of the marrow iron content was performed on digital photomicrographs of a single Prussian blue-stained section of marrow. Strong correlations were demonstrated between morphometric marrow iron content and (1) biochemical marrow iron content (r = 0.8, P = 0.006) and (2) biochemical hepatic iron index (r = 0.82, P = 0.004). We conclude that marrow transplant recipients have a high liver iron content at 50–100 days post transplant with the hepatic iron index in the hereditary hemochromatosis range. Computerized morphometric marrow iron determination is a readily available means of estimating hepatic iron stores in these patients.

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Strasser, S., Kowdley, K., Sale, G. et al. Iron overload in bone marrow transplant recipients. Bone Marrow Transplant 22, 167–173 (1998). https://doi.org/10.1038/sj.bmt.1701301

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