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Pseudomyxoma peritonei (PMP) is a clinical condition caused by cancerous cells (mucinous adenocarcinoma) that produce abundant mucin or gelatinous ascites. [1] The tumors cause fibrosis of tissues and impede digestion or organ function, and if left untreated, the tumors and mucin they produce will fill the abdominal cavity.
With a 5-year survival rate of 81% to 94%, mucinous breast cancer tends to have a good prognosis. There is also a low incidence of metastasis to lymph nodes. [2] Pure mucinous carcinoma has a more favorable prognosis compared to mixed type mucinous carcinoma.
The overall prognosis for patients with mucinous AIS is significantly worse than patients with nonmucinous AIS . [26] [27] Although data are scarce, some studies suggest that survival rates are even lower in the mixed mucinous/non-mucinous variant than in the monophasic forms. [27]
Informally, some experts have included these tumors as a distinct variant among a spectrum of mucus-producing adenocarcinomas, including — in order of increasing relative extent of cellular mucus production and extracellular mucus accumulation — solid adenocarcinoma, mucoepidermoid carcinoma, mucinous bronchioloalveolar carcinoma, signet ...
Average survival was between 20 and 45 months. [26] It tends to affect younger adults with higher likelihood of lymphovascular invasion. It is worth noting that the overall survival rate of patients with SRCC was significantly poorer than that of patients with mucinous or poorly differentiated adenocarcinoma. [27]
A mucinous neoplasm (also called colloid neoplasm) is an abnormal and excessive growth of tissue with associated mucin (a fluid that sometimes resembles thyroid colloid). It arises from epithelial cells that line certain internal organs and skin, and produce mucin (the main component of mucus ).
Appendix neoplasms by incidence and prognosis. Carcinoid tumors are the most common tumors of the appendix. [10] Other common forms are mucinous adenocarcinomas, adenocarcinoma not otherwise specified (NOS), and signet ring cell adenocarcinoma listed from highest to lowest incidence.
A subtype of adenocarcinoma, the bronchioloalveolar carcinoma, is more common in female never-smokers, and may have a better long-term survival. [13] This cancer usually is seen peripherally in the lungs, as opposed to small cell lung cancer and squamous cell lung cancer, which both tend to be more centrally located. [14] [15]