The other immunohistochemical markers that were positive in all the carcinoid tumors in which they were used were Synaptophysin (Figure 3C) (100%; 3/3), Neuron specific enolase (100%; 3/3), Serotonin (100%; 2/2), CD 56 (Figure 3D) (100%; 1/1), Thyroxine (Figure 3F) (100%; 1/1), Glucagon (100%; 1/1), and Somatostatin (100%; 1/1). Here, ENO2 is linked to carcinoid tumor.