Can a stage 4 lung cancer in remission?

Remission: A leukemia term. Ned=no evidence of disease. There can be "oligo-metastasis" (few that is) than can be ablated or even respond chemo. Exceptions to the rule that stage 4 generally conveysvery little hope for quality long term survival.

Variable progress: But not really cure or remission.

Not typical: Once lung cancer has become stage four it means that it has entered into the blood stream and begun showing up around the body in places other than the lung. Typically these go to the brain, bones, adrenal glands, and liver. Chemotherapy goes into the blood to shrink down and try to kill these cells but currently with consider this disease as treatable while not curable.