The type of acute myelogenous leukemia associated with a high incidence of disseminated intravascular coagulation is
**Core Concept**
Acute myelogenous leukemia (AML) is a heterogeneous group of hematological malignancies characterized by the clonal expansion of myeloid blasts in the bone marrow. Disseminated intravascular coagulation (DIC) is a complex condition involving both coagulation and fibrinolysis, often associated with severe bleeding and thrombosis.
**Why the Correct Answer is Right**
The type of AML associated with a high incidence of DIC is Acute Promyelocytic Leukemia (APL). APL is characterized by the translocation t(15;17), resulting in the formation of the PML-RARA fusion gene, which leads to the differentiation block of promyelocytes. The accumulation of these cells and their subsequent release into the circulation can activate the coagulation cascade, leading to the formation of microthrombi and DIC. The coagulopathy in APL is thought to be mediated by the release of tissue factor and other procoagulant substances from the abnormal promyelocytes.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the subtype of AML associated with DIC. While some other subtypes of AML may also be associated with coagulopathy, APL is the most commonly recognized type.
* **Option B:** This option is incorrect because it does not accurately describe the pathophysiology of DIC in AML. While AML can be associated with DIC, the specific mechanism and clinical features are more closely related to APL.
* **Option C:** This option is incorrect because it is too broad and does not specify the subtype of AML associated with DIC. AML is a heterogeneous group of diseases, and not all subtypes are equally associated with DIC.
**Clinical Pearl / High-Yield Fact**
APL is often associated with a characteristic "leukovoria" (yellowish skin discoloration) due to the accumulation of lipid-laden promyelocytes in the skin. This clinical finding is a classic clue to the diagnosis of APL, particularly in the absence of other symptoms or laboratory findings.
**Correct Answer: C. Acute Promyelocytic Leukemia (APL)**