Anti phospholipids syndrome characterized by all EXCEPT
**Core Concept**
Anti-phospholipid syndrome (APS) is a systemic autoimmune disorder characterized by the presence of antiphospholipid antibodies (aPL) and clinical manifestations such as thrombosis and pregnancy complications. APS is associated with an increased risk of arterial and venous thrombosis, as well as recurrent miscarriages and fetal losses.
**Why the Correct Answer is Right**
The correct answer is not among the options provided, but we can discuss the typical features of APS. APS is characterized by the presence of aPL, which are directed against phospholipid-binding proteins such as beta-2 glycoprotein I. These antibodies can lead to the activation of coagulation pathways, platelet activation, and endothelial damage, resulting in thrombosis. In addition, APS is associated with pregnancy complications, including recurrent miscarriages, fetal losses, and premature birth.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a classic feature of APS. Thrombosis is a hallmark of APS, and patients with APS are at increased risk of developing arterial and venous thrombosis.
**Option B:** This option is incorrect because it is a common manifestation of APS. Pregnancy complications, including recurrent miscarriages and fetal losses, are a major concern in patients with APS.
**Option C:** This option is incorrect because it is not a characteristic of APS. While APS is associated with inflammation and endothelial damage, it is not typically characterized by vasculitis.
**Clinical Pearl / High-Yield Fact**
APS can be triggered by various factors, including infections, autoimmune disorders, and certain medications. It is essential to recognize the clinical manifestations of APS and to consider testing for aPL in patients with unexplained thrombosis or pregnancy complications.
**Correct Answer:** D