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Photograph of resected hematoma. The thick outer neomembrane shows hyaline degeneration, and the thin inner membrane has meningothelial cells and hemosiderin pigments produced by old hemorrhage. A: The dura membrane has plentiful vascular structures (arrow). B: Hemosiderin pigments (arrow). C: Meningothelial cells (arrow). Hematoxylin and eosin staining. Original magnifications are marked by bars.
