Colorectal Cancer

Colorectal cancer is the third most common cancer in both men and women. According to the American Cancer Society, each year there are an estimated 101,000 colon and 40,000 rectal cancer cases diagnosed in the US, with an estimated 49,000 deaths, for about 9% of cancer deaths. Incidence and mortality rates continue to decline in both men and women, reflecting earlier detection through increased screening and improvements in diagnosis and treatment.

Early diagnosis of this disease is one of the key elements to its cure. Colorectal cancers probably develop slowly over a period of several years. Before a true cancer develops, there are often earlier changes in the lining of the colon or rectum. If disease is found early, before colorectal cancer has spread, it is considered curable. However, as the tumor spreads to involve adjacent organs or lymph nodes, a patient's five-year survival rate drops to 68%. If the cancer has already spread to distant organs, the long-term survival rate decreases substantially.


PET/CT scanning is an important addition to other tests that can be done right after you are diagnosed with cancer of the colon or rectum.

A PET/CT scan can help the physician determine whether surgery, chemotherapy or radiation therapy is the best treatment option.

PET/CT can be used to image colorectal cancer response to therapy and to detect recurrence in treated lesions.

PET/CT Utilization and Case Studies

PET/CT is a noninvasive test that physicians utilize to stage the entire body for the presence or absence of active tumor, localize the tumor, assess the tumor response to treatment and detect recurrence in treated lesions.

Source: American Cancer Society. Cancer Facts & Figures 2011. Atlanta: American Cancer Society; 2011