Positive for chromogranin A, synaptophysin, CD56, and somatostatin receptor–3; MIB‐1 index was very high, at approximately 70%, neuroendocrine cells characterized by a proliferation of small‐sized carcinoma cells with hyperchromatic nuclei and scanty cytoplasm with delicate fibrovascular stroma. Here, NCAM1 is linked to carcinoma.