Hematology BOC 7th Edition Practice Exam 2026 – Your All-in-One Guide to Certification Success!

Disseminated intravascular coagulation is the finding most closely linked to acute promyelocytic leukemia. APL has a distinctive risk of a severe coagulopathy driven by abnormal promyelocytes releasing tissue factor and other procoagulants and fibrinolytic factors. This triggers widespread clotting that consumes platelets and coagulation factors, leading to simultaneous clots and bleeding—often a presenting and potentially fatal feature. Lab clues include low fibrinogen, prolonged PT and aPTT, and elevated D-dimer. Clinically, bleeding is a major concern early on, making DIC the hallmark association. Other options—ringed sideroblasts, micromegakaryocytes, and the Philadelphia chromosome—are characteristic of different conditions and do not define APL.