A rare case of signet ring cell carcinoma of the appendix.

Primary appendiceal carcinoma itself comprises less than 0.5% of all gastrointestinal malignant neoplasms. However, signet ring cell carcinoma of the appendix is an extremely rare subset of primary appendiceal carcinomas. This sub-type of appendiceal carcinoma represents only 4% of all appendiceal carcinomas. In this case report, we present a case of signet ring cell carcinoma found in a 65-year-old male patient which presented as acute appendicitis. He was diagnosed after a laparoscopic appendectomy by histopathological evaluation.