Autoimmune destruction of platelet is seen in :
**Core Concept**
Autoimmune destruction of platelets is a condition where the immune system mistakenly attacks and destroys platelets, leading to thrombocytopenia (low platelet count). This is a classic example of an autoimmune disorder, where the body's immune response is directed against its own cells.
**Why the Correct Answer is Right**
The correct answer is **Immune thrombocytopenic purpura (ITP)**, also known as autoimmune thrombocytopenia. In ITP, autoantibodies are produced against platelet antigens, marking platelets for destruction by the spleen. This leads to a significant decrease in platelet count, increasing the risk of bleeding. The pathophysiology involves the production of autoantibodies against platelet-specific antigens, such as glycoproteins IIb/IIIa (GPIIb/IIIa) and glycoprotein Ib (GPIb).
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because Thrombotic Thrombocytopenic Purpura (TTP) is a condition characterized by thrombocytopenia, microangiopathic hemolytic anemia, and renal failure, but it is not caused by autoimmune destruction of platelets.
**Option B:** This is incorrect because Disseminated Intravascular Coagulation (DIC) is a condition characterized by both thrombosis and bleeding, but it is not an autoimmune disorder affecting platelets.
**Option C:** This is incorrect because Bernard-Soulier Syndrome is a rare bleeding disorder caused by a deficiency of glycoprotein Ib (GPIb), but it is not an autoimmune condition.
**Clinical Pearl / High-Yield Fact**
A key clinical feature of ITP is the presence of isolated thrombocytopenia, without other cytopenias or evidence of marrow failure. This is in contrast to other causes of thrombocytopenia, where multiple cytopenias or marrow failure may be present.
**Correct Answer:** C. Immune thrombocytopenic purpura (ITP)