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Breast- Abundant periostin positive stroma in an invasive lobular breast cancer. |
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Colon – Intense stromal periostin immunostaining in a colorectal adenocarcinoma. Focal epithelial periostin staining may reflect a “contamination artifact” caused by the very high levels of periostin in the surrounding stroma. |
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Colon- Colorectal adenocarcinoma showing little periostin positive material in the stroma. |
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Esophagus – Squamous cell carcinoma containing highly abundant periostin in the stroma. Epithelial periostin staining could reflect a “contamination artifact” caused by the very high levels of periostin in the surrounding stroma. |
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