Episode 209: Blast Crisis

Blast crisis represents a critical oncologic emergency characterized by a rapid proliferation of immature white blood cells exceeding 20% in the blood or bone marrow, most commonly occurring in patients with Chronic Myeloid Leukemia (CML). Dr. Sadakat Chowdhury, an emergency medicine expert, identifies key clinical triggers for recognition, including symptoms of leukostasis, hyperviscosity, and functional neutropenia which leaves patients highly susceptible to sepsis. Diagnostic priorities in the emergency department involve identifying profound cytopenias on a CBC and monitoring for tumor lysis syndrome through electrolyte and uric acid levels. Effective management necessitates a cautious resuscitation strategy that avoids aggressive red blood cell transfusions to prevent worsening hyperviscosity, alongside the immediate administration of broad-spectrum antibiotics. Definitive stabilization requires early consultation with hematology for cytoreduction therapies like leukapheresis or hydroxyurea, as untreated patients face a median survival of only three to six months.