Cancer Treatment Centers of America

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Colorectal cancer stages

Making an educated treatment decision begins with the stage, or progression, of the disease. The stage of colorectal cancer is one of the most important factors in evaluating treatment options.

Our cancer doctors use a variety of diagnostic tests to evaluate colorectal cancer and develop an individualized treatment plan. If you have been recently diagnosed, we will review your pathology to confirm you have received the correct diagnosis and staging information, and develop a personalized treatment plan. If you have a recurrence, we will perform comprehensive testing and identify a treatment approach that is suited to your needs.

Video: Cancer Staging

Cancer Staging

Stage IV colorectal cancer

Stage IV is the most advanced stage of colorectal cancer. If you have been diagnosed with stage IV colorectal cancer, it means that the cancer has metastasized to distant sites, such as the liver or lungs. The cancer may or may not have grown through the wall of the colon or rectum, and lymph nodes may or may not have been affected.

Stage IV colorectal cancer is further divided into two categories, depending on whether or not the metastasis has affected more than one organ. The original tumor can be of any size and lymph nodes may or may not be involved, but if the cancer has spread to one different organ it is considered stage IVA, while more than one organ would be defined as stage IVB.

Stage IV colorectal cancer can be defined by any T or N category, with the only difference stemming from whether the M1 or M2 assignment is more appropriate.

In both forms of stage IV colorectal cancer, the tumor can be of any size (T), and lymph nodes may or may not be involved (N). M1a indicates that the cancer has spread to just one organ, while M1b would mean that more than one organ has been affected.

We're here to guide you through the cancer journey

We understand you may be feeling overwhelmed with questions and concerns about your type of cancer and what it all means. We're here to help guide you through the process.

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Discuss treatment options with an Oncology Information Specialist, who is available 24/7 at (800) 615-3055, or chat with us.

An accurate cancer diagnosis

accurate cancer diagnosis

Our team of cancer experts uses advanced, minimally invasive diagnostic technology to detect cancerous cells anywhere in the body.

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