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A member asked:
What is the difference between stage 3a and stage 3b of lung cancer in terms of tnm?
7 doctors weighed in across 2 answers
3b is more advanced: Although both stages are serious, stage 3b tends to have more severe lymph node spread, usually meaning spread out side the affected side of the chest to the collar bone, neck or lymph nodes in the opposite chest. The 5 year survival with 3a is 20-25%, with 3b is 10%.
Answered 8/18/2018
5.5k views
See below: 3a - t3n1; t4n0; t1-3n2. 3b - t4n2; t1-4n3. Any m makes it stage 4. This is out of the newest TNM classification 2010. It is very confusing to both doctors and patients but seemingly well-grounded. Go to uptodate www.Utdol.Com.
Answered 9/28/2019
5.5k views
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