CD56 (NCAM) immunohistochemistry is also used by pathologists to identify specific tumors such as pheochromocytoma, paraganglioma, T cell/ natural killer lymphoma, myeloid leukemia, myeloma, neuroendocrine tumors, Wilms’ tumor, neuroblastoma, pancreatic acinar cell carcinoma, Ewing’s Sarcoma and small cell carcinoma of lung. The gene discussed is NCAM1; the disease is myeloid leukemia.