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www.healthline.com/health/lung-cancer/stage-3-symptoms-outlook

When lung cancer reaches stage 3, it has spread from the lungs to other nearby tissue or distant lymph nodes. The broad category of stage 3 lung cancer is divided into two groups, stage 3A and ...

www.verywellhealth.com/stage-3-lung-cancer-overview-2249380

Locally advanced lung cancer - Stage 3A is considered locally advanced lung cancer. These tumors have not spread to distant regions of the body, but have spread to lymph nodes on the same side of the body as the tumor. Stage I to stage 3A lung cancers are considered "operable" meaning that surgery offers a chance for a cure.

www.medicalnewstoday.com/articles/316450.php

Stage 3 lung cancers are further divided into stage 3a and stage 3b cancers depending on the extent and size of the tumor. Roughly one-third of people diagnosed with lung cancer have stage 3 lung ...

www.webmd.com/lung-cancer/lung-cancer-stages

Continued Non-Small Cell Lung Cancer Stages. Non-small cell lung cancer (NSCLC) is a more common type of lung cancer than small cell. One way to describe NSCLC is by its clinical or pathologic stage.

www.cancerresearchuk.org/about-cancer/lung-cancer/stages...

Find out what stage 3 lung cancer means and about treatments. The stage of a cancer tells you how big it is and whether it has spread. Knowing the stage helps your doctor decide which treatment you need. It can also give some idea of your outlook (prognosis). Stage 3 is part of the number staging ...

www.cancer.gov/.../def/stage-iiib-non-small-cell-lung-cancer

Stage III non-small cell lung cancer is divided into stages IIIA, IIIB, and IIIC. In stage IIIB, the tumor is 5 centimeters or smaller and cancer has spread to lymph nodes above the collarbone on the same side of the chest as the primary tumor or to any lymph nodes on the opposite side of the chest as the primary tumor.

www.lung-cancer.com/stage3.html

In Stage IIIB, the cancer has extended into lymph nodes in the neck or in the opposite lung from its origin. All forms and stages of lung cancer are established in a definitive diagnosis through a biopsy. This involves the doctor inserting a needle into the chest and withdrawing a sample of tissue.

www.cancer.gov/about-cancer/diagnosis-staging/staging

So, the stage doesn't change, even though the cancer might. How Stage Is Determined. To learn the stage of your disease, your doctor may order x-rays, lab tests, and other tests or procedures. See the section on Diagnosis to learn more about these tests. Systems that Describe Stage. There are many staging systems.

www.cancer.org/cancer/small-cell-lung-cancer/detection...

After someone is diagnosed with small cell lung cancer (SCLC), doctors will try to figure out if it has spread, and if so, how far. This process is called staging. The stage of a cancer describes how much cancer is in the body. It helps determine how serious the cancer is and how best to treat it ...

www.cancer.org/cancer/non-small-cell-lung-cancer/detection...

After someone is diagnosed with non-small cell lung cancer (NSCLC), doctors will try to figure out if it has spread, and if so, how far. This process is called staging. The stage of a cancer describes how much cancer is in the body. It helps determine how serious the cancer is and how best to treat ...