All are true regarding thrombotic thrombocytopenia purpura except
**Core Concept**
Thrombotic thrombocytopenia purpura (TTP) is a rare blood disorder characterized by the formation of blood clots in small blood vessels throughout the body, leading to a decrease in platelet count and various systemic symptoms. The condition is often associated with a deficiency in the enzyme ADAMTS13, which is responsible for cleaving and inactivating von Willebrand factor (VWF).
**Why the Correct Answer is Right**
TTP is indeed characterized by the following features:
- **Microangiopathic hemolytic anemia (MAHA)**: The formation of blood clots in small blood vessels leads to the destruction of red blood cells, resulting in anemia and schistocytes (fragmented red blood cells) on the peripheral smear.
- **Thrombocytopenia**: The consumption of platelets in the formation of blood clots leads to a decrease in platelet count.
- **Renal failure**: The formation of blood clots in the kidneys can lead to acute kidney injury or failure.
- **Neurological symptoms**: TTP can cause a range of neurological symptoms, including headache, confusion, and seizures.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while TTP can cause a range of symptoms, it is not typically associated with fever as a primary symptom.
**Option B:** This option is incorrect because while TTP can cause thrombocytopenia, it is not typically associated with an elevated platelet count.
**Option C:** This option is incorrect because while TTP can cause renal failure, it is not typically associated with an elevated creatinine level as a primary symptom.
**Option D:** This option is incorrect because while TTP can cause neurological symptoms, it is not typically associated with a primary diagnosis of stroke.
**Clinical Pearl / High-Yield Fact**
TTP is often associated with a deficiency in the enzyme ADAMTS13, which is responsible for cleaving and inactivating von Willebrand factor (VWF). This deficiency can lead to an accumulation of ultra-large VWF multimers, which can cause platelet activation and the formation of blood clots.
**Correct Answer: A**