Neuroendocrine carcinoma
Carcinoid of small intestine
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| Trabecular and reticular pattern; not exactly insular |
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| Slight insular pattern seen |
Pancreas
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| Chromogranin |
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| Vague 'cell balls' separated by capillaries |
Lung
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| TTF1 - absent (i.e. not endodermal, unlike lung) |
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| Synaptophysin |
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| Chromogranin |
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| Chromogranin |
