NCAM1 and neoplasm: Pathology is the gold standard for diagnosis, and Okubo[4]et al pointed out that DGP has 3 characteristic tumor components: epithelioid cells, ganglion cells, and spindle cells, and its immunohistochemical features are as follows: positive markers for epithelioid cells include CD56, Syn, neuron-specific enolase (NSE), progesterone receptor, pancreatic polypeptide, growth inhibitory hormone, chromogranin A, and cytokeratin.