Fig. 4
From: Primary hepatic neuroendocrine tumors: multi-modal imaging features with pathological correlations
Microscopic findings in primary hepatic neuroendocrine tumors as observed under high magnification (200×). (a) The tumor cells appeared to surround a glass-like cylindrical arrangement of red stained substance (indicating cytoplasm); nuclei were counterstained. Immunohistochemical synaptophysin (Syn) staining and pancreatic and duodenal homeobox 1(PDX1) staining in positive tumor cells is also shown