Goblet Cell Carcinoid, Group A

Typical goblet cell carcinoid (GCC), group A showing well-defined clusters of goblet cells lacking significant cytologic atypia. The tumor clusters are surrounded by inflammatory cells. The patient presented with acute appendicitis. The classification of GCC's proposed by Tang et al (Am J Surg Pathol 2008; 32:1429-1443) subdivides them into three groups: 1) typical GCC (Group A); 2) adenocarcinoma ex GCC, signet ring cell type (Group B); and adenocarcinoma ex GCC, poorly differentiated type (Group C).