What is the likelihood of lung cancer when ct scan shows pre-tracheal, subcarinal and right hilar lymphadenopathy. if cancer, is it stage 4 already?

Lung cancer: What did the CT show about the lungs and other organs?, That is usually the criteria for stage IV. Stage IV you have lung cancer in either more than 1 lung or lobe and another part of the body(liver, bone). Having cancer in lymph nodes can be stage II or III depending on size of the lung mass 3 cm. Biopsy would show cancer in lymph nodes, as they can also be enlarged due to inflammati