{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"CD56 or Neural-Cell Adhesion Molecule (NCAM) is a homophilic binding glycoprotein expressed on the surface of neurons, glia and skeletal muscle. CD56 has been implicated in cell-cell adhesion, neurite outgrowth, synaptic plasticity, and learning and memory.\nNormal cells that stain positively for CD56 include NK cells, activated T-cells, brain and cerebellum, and neuroendocrine tissues. CD56 expression in myeloma, myeloid leukemia, neuroendocrine tumors, Wilms tumor, adult neuroblastoma, NK/T cell lymphomas, pancreatic acinar-cell carcinoma, pheochromocytoma, and small-cell lung carcinoma have been reported in literatures."}]}]}