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Light micrograph of a section of human lung affected by haemosiderosis, a condition characterized by the excessive deposition of iron, usually due to excessive intake in blood transfusions. Here, deposits of iron appear in blue/black stained clumps. The heart & liver are also affected. A comparable condition, haemochromatosis, results from an inherited defect in iron metabolism and affects many organs, including the liver, pancreas & endocrine glands. Magnification: x60 at 35mm size. Magnification: x100 at 3x3-inch original size.
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