Final answer:
The term for a mass in the lung that originated from liver cancer is called a metastasis. It indicates that the cancer has spread from the primary liver tumor through the bloodstream to form a new tumor in the lung.
Step-by-step explanation:
If a liver cancer migrates to the lung, the mass in the lung would be termed a metastasis. This term is used when cancer cells from a primary tumor travel through the bloodstream to a distant site and form a new cancer. Malignant tumors, like hepatomas, can spread beyond their original site, leading to metastasis. For example, cancer that originates in the liver and spreads to the lung retains the characterization of liver cancer, but it is now also considered a metastatic tumor in the lung.