Colon Cancer Specialist

Last updated: Sept 20 2026

Colon cancer is one of the most common cancers in the United States, and more than 100,000 people are diagnosed with it each year. The good news is that regular screening can find colon cancer early, when it is most treatable, and can even prevent it by removing precancerous polyps. At Wellness Oncology & Hematology, our board-certified oncology team in West Hills and Tarzana, California, provides personalized care for patients with colon cancer and coordinates with the specialists involved in diagnosis and treatment. If you have been diagnosed with colon cancer or referred for an oncology consultation, schedule an appointment today by phone or online.

What is colon cancer?

The colon is the longest part of the large intestine, and it plays a key role in the final stages of digestion. Colon cancer develops when abnormal cells in the colon grow uncontrollably. Many colon cancers begin as polyps, or growths in the lining of the colon, that can become cancerous over time.

Because this process is often slow, screening is especially valuable because it can identify and remove precancerous polyps and detect colon cancer at an earlier stage, when treatment may be more effective.

What causes colon cancer, and who is at risk?

The exact cause of colon cancer is not always known, but several factors can increase your risk. These include a personal history of polyps or a prior cancer diagnosis, chronic intestinal conditions such as inflammatory bowel disease, and a family history of colorectal cancer.

Lifestyle and age also play a role. Risk rises after age 45 and is higher for people with obesity, a sedentary lifestyle, a diet high in red or processed meat, smoking, or regular alcohol use. If any of these apply to you, talk with your provider about when to begin screening.

What are the symptoms of colon cancer?

In its early stages, colon cancer may cause no symptoms and can be detected through routine colorectal cancer screening. As the disease progresses, patients may notice:

• A change in bowel habits, such as diarrhea or constipation
• Blood in the stool or rectal bleeding
• Abdominal cramps or pain
• Persistent weakness or fatigue
• A feeling that the bowel does not empty completely
• Unexplained weight loss

Because these symptoms can also point to other conditions, it is important to have them evaluated promptly.

How is colon cancer diagnosed?

If colon cancer is suspected, evaluation may include a review of your medical history, a physical examination, and a colonoscopy. During a colonoscopy, the colon and rectum can be examined for abnormal areas, and tissue samples can be collected for biopsy when needed. During this procedure, your doctor uses a flexible scope with a camera to examine the colon and rectum and may take tissue samples (a biopsy) for analysis. Colorectal cancer screening generally begins at age 45 for people at average risk. People with a family history of colorectal cancer or other risk factors may need to begin screening earlier or follow a different screening schedule. Your healthcare provider can recommend an appropriate screening method and schedule based on your individual risk.

Colon cancer treatment options at Wellness Oncology & Hematology

Treatment depends on the stage of colon cancer, your overall health, and other characteristics of the disease. Surgery is an important treatment for many localized colon cancers, while chemotherapy may be recommended before or after surgery or as part of treatment for more advanced disease. Other therapies may be considered depending on the characteristics and stage of the cancer.

Colon cancer care often involves several specialists. Our oncology team develops an individualized medical treatment plan, coordinates with surgeons and other members of your care team, and helps you understand what each stage of treatment involves.

Why choose Wellness Oncology & Hematology for colon cancer care

Our board-certified oncologists and hematologists provide concierge-style, patient-centered cancer care across two San Fernando Valley locations. From understanding your diagnosis and treatment options to navigating treatment and follow-up, you receive personalized attention from a team that takes the time to listen, answer questions, and coordinate your care.

Schedule a colon cancer consultation in Tarzana or West Hills

Whether you have recently been diagnosed with colon cancer, received an abnormal test result, or have been referred for oncology care, our team can help you understand your diagnosis and treatment options. Call our West Hills office at (818) 346-1773 or our Tarzana office at (818) 705-3900, or book your appointment online today.