Appendix Goblet Cell Carcinoid (EFO_1000090) is an invasive mixed adenoneuroendocrine carcinoma of the appendix characterized by a submucosal growth and the presence of neoplastic signet-ring cells resembling goblet cells of the intestine. Also known as: appendix adenocarcinoid tumor, appendix goblet cell carcinoid, appendix goblet cell carcinoid tumor, appendix mixed carcinoid-adenocarcinoma, goblet cell carcinoid of appendix, goblet cell carcinoid of the appendix, goblet cell carcinoid tumor, mucinous carcinoid tumor.