Stage 1 usually means that a cancer is small and contained within the organ it started in ![]() Here is a brief summary of what the stages mean for most types of cancer: ![]() Doctors often write the stage down in Roman numerals. Number staging systems use the TNM system to divide cancers into stages. Most types of cancer have 4 stages, numbered from 1 to 4. Doctors may look at your tests results and use the information from examining you. It means that the stage is based on what the doctor knows about the cancer before surgery. The letter c is sometimes used before the letters TNM. It means that doctors based the staging on examining cancer cells in the lab after surgery to remove a cancer. The letter p is sometimes used before the letters TNM. Stage M1b lung cancer has spread to one other part of the body. Stage M1c lung cancer has spread to more than one part of the body. For example, stage M1a lung cancer is a cancer that has spread to the other lung. Sometimes doctors use the letters a, b or c to further divide the categories. Or a more advanced cancer that has spread may be T4 N3 M1. So for example a small cancer that has spread to the lymph nodes but not to anywhere else in the body may be T2 N1 M0. M0 means that the cancer hasn't spread and M1 that the cancer has spread. M refers to whether the cancer has spread to another part of the body. And 3 means that there are lots of lymph nodes containing cancer cells. 0 means that there are no lymph nodes containing cancer cells. N refers to whether the cancer has spread to the lymph nodes. It can be 1, 2, 3 or 4, with 1 being small and 4 large. T refers to the size of the cancer and how far it has spread into nearby tissue. The system uses letters and numbers to describe the cancer.
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