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Thymoma : Perivascular Spaces

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Mediastinum_Thymoma_PerivascularSpace.jpg

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Perivascular spaces in a thymoma contain a loose network of neoplastic epithelial cells, lymphocytes, proteinaceous fluid, red blood cells, and foamy histiocytes. They are more commonly seen in Type B Thymomas. This image is from a case of Type B2 Thymoma.

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