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Granulocytic Sarcoma in Kidney : Gross morphology

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Granulocytic sarcoma (also previously known as Chloroma) refers to tumor-like lesions of extramedullary myeloid leukemia. They have characteristic green color on cut surface due to myeloperoxidase as illustrated in this case which fades on standing. Immunoreactivity for chloroacetate esterase and myeloperoxidase is diagnostic.

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