Which of the following markers is not typically expressed by neuroendocrine tumours?
Correct Answer: CK7
Description: CK7 is an epithelial cell marker and is positive in carcinomas (especially the epithelial tumours arising from foregut). The following immunohistochemical markers are positive in neuroendocrine neoplasms: Synaptophysin Chromogranin A CD56 Neuron specific enolase (NSE)
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Pathology
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