Leukemia is cancer that affects white blood cells, which grow in bone marrow and help fight infection. Acute lymphoblastic leukemia (ALL) prevents lymphoblasts, an immature type of white blood cell, from developing into mature lymphocytes. ALL cells accumulate and crowd out healthy blood cells.
Head and neck tumors are those that grow in the nose, sinuses, mouth (oral cavity), throat (pharynx), voice box (larynx), salivary glands, lymph nodes in the neck, thyroid gland or parathyroid glands. They can be cancerous or noncancerous (benign).
When cancer starts in the tissue of the liver it is referred to as primary liver cancer.
When cancer has spread (or metastasized) from another organ into the liver, it is referred to as secondary liver cancer or metastatic liver cancer. In the U.S., metastatic liver cancer is more common than primary liver cancer.