How can cancer spread from lungs to liver

Explanation:

Stage IV (stage 4 liver cancer): The cancer has spread to nearby lymph nodes and may have grown into nearby blood vessels or organs. Advanced liver cancer does not often metastasize (or travel to distant organs), but when it does, it is most likely to spread to the lungs and bones.

Cancer can spread from the lung to the liver through a process called metastasis.

Explanation:

When cancer spreads beyond the place where it started (primary site) to other parts of the body it is called metastasis. Metastasis can occur when cancer cells travel through the bloodstream or lymphatic vessels to other areas of the body. Many of the cancer cells that detach from the primary tumor die without causing any problems. But some come to a new area where they begin to grow and form new tumors.