What is liver metasis stage 4? Is it cancer? Considering the person diagnosed to also have tumor in the pancreas

Yes. Yes. It is cancer that has spread to the liver. The tumor in the pancreas may be the primary tumor. You may want to go to http://www.cancercompass.com to learn more about cancer.
Cancerous Tumor. Unfortunately, another name for this cancer is metastatic, or stage IV.
Liver Cancer. Not good practitioner to help this patient. Please refer to GP or uncologist.