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. 2019 Aug 13;12(8):e230402. doi: 10.1136/bcr-2019-230402

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© BMJ Publishing Group Limited 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Sections of paraffin-embedded tissue stained with periodic acid-Schiff shows one tubule (arrow) attacked by many lymphocytes invading its epithelial lining (400x magnification).