👉 Karyenchyma is a type of cancer that occurs in the cells of the bone marrow, or the part of the body where blood-forming cells are found. It's often called a "tumor" because it can grow and divide uncontrollably. When a tumor grows to a certain size, it can invade other tissues, like the lungs or liver, causing pain, fever, and fatigue. This is when doctors call it "metastasis," which means spreading out from one