When Appendicitis Masks a Malignancy: A Case of Appendiceal Goblet Cell Adenocarcinoma.

Goblet cell adenocarcinoma (GCA) of the appendix is a rare, mucus-producing tumor that exhibits both mucinous and neuroendocrine differentiation. It is most commonly diagnosed in patients presenting with acute appendicitis, and the definitive diagnosis is typically made after pathological examination. GCA is associated with a high risk of metastasis, with common sites including the right colon, ileum, lymph nodes, peritoneum, and omentum, and ovarian metastases are particularly noted in women with stage 4 disease. This case study focuses on a 55-year-old female patient who presented with right lower quadrant pain and was diagnosed with GCA following an appendectomy. The patient then underwent a complete right hemicolectomy as definitive therapy. This case highlights the challenges of diagnosing GCA, the importance of timely intervention, and the current treatment strategies.