Tumors deriving from A99 and TCC-NECT-2 were diffusely positive for chromogranin A (Figures 4C, 6C) and synaptophysin (Figures 4D, 6D), and tumor deriving from TYUC-1 was focally positive for both of them (Figures 5C, 6D). The gene discussed is SYP; the disease is neoplasm.