Disseminated intravascular coagulation (DIC) differs from thrombotic thrombocytopenic purpura. In this reference the DIC is most likely characterized by:
**Core Concept**
Disseminated intravascular coagulation (DIC) and thrombotic thrombocytopenic purpura (TTP) are two distinct hematologic disorders characterized by coagulation abnormalities. While both conditions involve thrombocytopenia and microvascular thrombi, they differ in their pathophysiology and clinical presentation.
**Why the Correct Answer is Right**
DIC is a complex condition that involves the activation of the coagulation cascade, leading to the formation of microthrombi in small blood vessels. This results in the consumption of platelets and clotting factors, ultimately causing coagulopathy and bleeding. The correct answer highlights the key feature of DIC: **consumption of coagulation factors**. In contrast, TTP is characterized by the formation of microthrombi due to the deficiency of ADAMTS13, a metalloprotease that cleaves and regulates von Willebrand factor (VWF). The correct answer is focused on the **consumption of coagulation factors**, which is a hallmark of DIC.
**Why Each Wrong Option is Incorrect**
* **Option A:** **Normal levels of coagulation factors** is incorrect because DIC is characterized by the consumption of coagulation factors, leading to their decreased levels.
* **Option B:** **Inhibition of ADAMTS13** is incorrect because TTP is characterized by the deficiency of ADAMTS13, not DIC.
* **Option C:** **Presence of anti-platelet antibodies** is incorrect because this is more relevant to immune thrombocytopenic purpura (ITP), not DIC.
**Clinical Pearl / High-Yield Fact**
In DIC, the consumption of coagulation factors can lead to a complex clinical picture that includes bleeding, thrombosis, and organ dysfunction. It is essential to recognize the key features of DIC, including the consumption of coagulation factors, to differentiate it from other hematologic disorders.
**Correct Answer:** C. Consumption of coagulation factors.