There are many types of colon cancer, according to the general typing generally augmented type is milder, the histologic classification of adenocarcinoma condition is relatively mild. Colon cancer is a malignant tumor originated from the mucosal epithelium of colon, which is relatively common. Early stage patients are usually asymptomatic, and symptoms such as blood in stool and abdominal pain will appear after progression. There are many types of colon cancer and it is impossible to generalize which type is milder. According to the general classification, colon cancer can be divided into bulging type, ulcerated type and invasive type, among which bulging type is relatively milder, meaning that the main body of the tumor protrudes towards the intestinal lumen, and the surface of the mass may have ulcers when it increases in size. According to histological classification, colon cancer can be divided into adenocarcinoma, adenosquamous carcinoma and undifferentiated carcinoma, among which adenocarcinoma is the most common pathological type of colon cancer and also a milder one. Adenosquamous carcinoma is less common and consists of squamous and adenocarcinoma cells. Undifferentiated carcinoma refers to cancer cells that are in the form of sheets or clusters with irregular cell arrangement and has a poorer prognosis. There are many types of colon cancer, and patients are advised to seek medical examination and detailed counseling.