[Hematological emergencies].

In this short review some important hematologic emergencies, that have been discussed at a round table on the occasion of the 22, meeting of internal medicine in central Switzerland are outlined without intention to be complete. The following emergencies are featured: Anemia, increased hematocrit (polyglobulia), severe (unexpected) neutropenia, marked hyperleukocytosis and leukemias, severe thrombocytopenia; thrombocytopathies (hereditary or acquired), von Willebrand-disease, acquired or hereditary coagulation disorders (coagulopathies), acute venous thrombosis; acute hemolytic transfusion reaction, posttransfusion purpura, severe autoimmune hemolysis.