Parental leave or family leave is an employee benefit available in almost all countries. The term parental leave generally includes maternity, paternity, and adoption leave. In some countries and jurisdictions, family leave also includes leave provided to care for ill family members. Often, the minimum benefits and eligibility requirements are stipulated by law.
Summary Summary. Myelofibrosis is a disorder of the bone marrow, in which the marrow is replaced by fibrous (scar) tissue. When the bone marrow is scarred, it cannot make enough blood cells. This leads to anemia, weakness, fatigue, and often, swelling of the liver and spleen.
Myelofibrosis occurs when blood stem cells develop a genetic mutation. Blood stem cells have the ability to replicate and divide into the multiple specialized cells that make up your blood â red blood cells, white blood cells and platelets. It's not clear what causes the genetic mutation in blood stem cells.