Mucinous adenocarcinoma is generally found in about 80% of patients with stage I, decreasing to about 10% with stage IV. The specific life expectancy is affected by various clinical factors such as the patient’s stage, physical status, and the degree of differentiation of cancer cells. Mucinous adenocarcinoma is a kind of malignant tumor originated from glandular epithelium and the cancer cells secrete more mucus. Generally speaking, the earlier the patient’s clinical stage is, the longer the patient’s survival time is. The survival time of patients with good physical status is longer than that of patients with poor physical status. The better the differentiation of the cancer cells, the longer the survival time of the patient will be. For example, for mucinous carcinoma occurring in the gastrointestinal tract, if the patients are in early stage and in good physical condition, and the cancer cells are well-differentiated and highly-differentiated types, most of the patients can obtain a survival period of five or more than five years after surgery and other treatments. On the contrary, patients with advanced stage of the disease, who have poor physical strength and cannot tolerate anticancer treatment, and whose cancer cells are poorly differentiated and hypo-differentiated, will have a survival period of only a few months. It is recommended that patients be actively treated after diagnosis to prolong survival.