Appendiceal mucinous neoplasm
If complicated by pseudomyxoma peritonei with peritoneal mucinous implants and ascites, or if the neoplasm ruptures, the prognosis is less favorable. If it shares the features of mucinous cystadenocarcinoma, then the underlying tumor is believed to be malignant and shows indication of spreading beyond the appendix.
A variety of surgical techniques have been recommended depending on the malignant determination of the mucinous neoplasm. Noncarcinoid appendiceal neoplasms may be removed by right hemicolectomy. Some believe appendectomy is sufficient. Laparoscopic resection has been shown to have favorable 2-year follow-up. It is believed that any mucinous material not completely removed may cause recurrence of the neoplasm. Some recommend surgical debulking and intraperitoneal chemotherapy.
D12.1 – Benign neoplasm of appendix
450896006 – Low grade appendiceal mucinous neoplasm