Tissue cores infiltrated by solid nests, trabeculae, and anastomosing cords embedded within a prominent desmoplastic stroma. The tumor cells are monotonous, exhibiting round to oval nuclei with finely granular "salt-and-pepper" chromatin and inconspicuous nucleoli, with moderate amounts of granular eosinophilic cytoplasm.
Immunostaining revealed diffuse positive reaction to synaptophysin and CK7, whereas negative to CK20, CDX2 and TTF1.
Picture is that of metastatic neuroendocrine tumor, grade 2. Metastatic work up is recommended specially for upper GIT.
Multiple hepatic nodules.
One referred paraffin block.
Hepatic nodules, guided core biopsy: