Final answer:
A metastatic tumor in the 3rd stage refers to a cancerous tumor that has spread to other parts of the body through the bloodstream. Common metastasis sites include the brain, lungs, bones, and liver. The prognosis for metastasized cancer is generally poor.
Step-by-step explanation:
A metastatic tumor in the 3rd stage refers to a cancerous tumor that has spread from its original location (primary tumor) to other parts of the body through the bloodstream, a process known as metastasis. Cancer cells that undergo metastasis can form new tumors in different tissues. Different types of cancers tend to metastasize to particular organs, with common sites being the brain, lungs, bones, and liver. The prognosis for cancer that has metastasized is generally poor.