Oncology is the study and treatment of cancer and tumors. An oncologist is a physician who diagnoses and treats cancer patients. The oncologist sometimes uses chemotherapy, and consults with other physicians to coordinate other methods of cancer treatments for a patient. Cancer patients need to take in to account the likelihood of a cure, or of prolonging life when cure is not possible, the effect of treatment on their symptoms, and the side effects of the treatment. People who are candidates for radiation therapy or anti-cancer drugs need to understand the risks involved with treatment. An oncologist can help to counsel a patient on treatment options and what to expect.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are colon cancer, breast disease, spinal cord tumors, melanoma, skin cancer, breast cancer, bone marrow, hodgkin's disease, lymphoma, mesothelioma, sarcoma, lung cancer, leukemia, pancreatic cancer, cervical cancer, liver cancer, mesothelioma cancer (asbestos cancer), brain cancer, acute myeloid leukemia, and bone cancer.

Once properly diagnosed, practitioners can perform numerous procedures on patients including colonoscopy, breast reconstruction, chemotherapy, brachytherapy, cryosurgery, mastectomy, cryotherapy, cabg, breast surgery, surgery, radiotherapy, bone marrow transplantation (bmt), adjuvant therapy, monoclonal antibody treatments, external beam radiotherapy, hormone manipulation, and immunotherapies.

To diagnose patients with possible illnesses and diseases, specialists will often perform one of many tests including biopsy, mri scanning, beta- hcg, ct scanning, x-rays, magnetic resonance imaging (mri), computed axial tomography (ct or cat scan), ultrasound, endoscopy, nse, cea, blood tests, ca 125, tumor markers, beta hcg, positron emission tomography, scintigraphy, psa, and alpha fetoprotein.

Doctor density varies by specialty and location. Colorado has 172 practicing oncologists. Broken out by city, oncology doctor density in Akron is 1, in Aurora is 36, in Basalt is 1, in Boulder is 13, in Colorado Springs is 17, in Denver is 79, in Durango is 7, in Edwards is 1, in Englewood is 8, in Fort Collins is 8, in Glenwood Springs is 7, in Golden is 1, in Grand Junction is 6, in Greeley is 6, in Greenwood Village is 1, in Hayden is 1, in Highlands Ranch is 1, in Lakewood is 6, in Littleton is 12, in Lone Tree is 8, in Longmont is 7, in Louisville is 1, in Loveland is 4, in Montrose is 3, in Pueblo is 5, in Salida is 3, in Thornton is 5, in Vail is 1, in Wheat Ridge is 4, and in Yuma is 2.

Colorado is the Centennial state; having won statehood in 1876. Its capital is Denver, called the “Mile High City,” because its altitude at the state capitol steps is 5,280 feet. Colorado’s population is 4,653,023, and over half the state’s population is in the Denver metro area. Known for its Rocky Mountains and abundant outdoor sports opportunities, such as skiing, hiking, fishing and hunting, Colorado also offers tourists Pike’s Peak, the Royal Gorge, and the Red Rocks outdoor amphitheater. Denver is home to an active theater culture, a world-class symphony, and many sports activities. You can visit a gold mine, tour the state capitol building, climb a mountain, or relax in some therapeutic natural hot springs.

According to 2005 Census estimates, Colorado has a population of 4,665,177. Of this population, 1,140,002 are under the age of 18 and 462,190 are at or above the age of 65.