Introduction
The treatment of colorectal cancer is based largely on its stage at the time of diagnosis, although other factors may influence the choice of therapy. For example, in some patients, the use of chemotherapy following surgery may depend on factors that indicate a high risk for recurrence. The use of certain targeted therapies may depend on the presence or absence of specific genetic alterations in the tumor. Other factors that may influence the choice of therapy include the tumor histology, the presence or absence of lymph node invasion, the patient's age, and the patient's general health.
Chapter 1