Final answer:
The mass in the lung caused by cancer originating from the liver and migrating to the lung is termed "metastasis".
Step-by-step explanation:
If a liver cancer migrates to the lung, the mass in the lung would be termed metastasis. The term metastasis refers to the process by which cancer cells spread from the primary tumor to distant organs. These new cancerous growths are also called metastases. When cancer cells that originate in one organ, such as the liver, travel through the bloodstream and form a new cancer in the lungs, it is considered secondary lung cancer. The process of cancer cells spreading to distant sites like the brain, bones, liver, or lungs occurs in many forms of cancer, especially in late stages of the disease, and is associated with most cancer deaths.