**Question:** A 23-year-old primigravida at 33 weeks of pregnancy presents with jaundice for two days. On examination, her blood pressure is 140/90 mmHg, serum bilirubin is 5 mg%, hemoglobin is 8 g/dL, platelet count is 90,000/cu.mm, TLC is 10,000/cu.mm, blood sugar is 40 mg/dL. AST and ALT are 85 and 80 IU/L respectively. What is the probable diagnosis?

A. Acute fatty liver of pregnancy
B. Viral hepatitis
C. HELLP syndrome
D. Hemolysis due to immune thrombocytopenic purpura (ITP)

**Core Concept:**

The question is discussing a pregnant patient presenting with jaundice and multiple organ system involvement, which requires an evaluation of different liver disorders and their associated clinical features. The key concepts to understand here are jaundice, elevated liver enzymes, and thrombocytopenia in pregnancy.

**Why the Correct Answer is C (HELLP Syndrome):**

HELLP syndrome stands for Hemolysis, Elevated Liver enzymes, and Low Platelet count. It is a severe complication of pregnancy-induced liver disease, which occurs in 0.5-1% of all pregnancies. The symptoms and signs of HELLP syndrome can mimic other liver disorders. However, certain key factors differentiate it from the other options:

1. It occurs in pregnancy and usually presents after 20 weeks of gestation.
2. There is a significant rise in liver enzymes (AST, ALT) along with thrombocytopenia.
3. Hemolysis is usually present, though it may not always be evident clinically.

**Why the other options are incorrect:**

A. Acute fatty liver of pregnancy (AFLP) is a rare but severe liver disorder in pregnancy. However, AFLP typically presents later in pregnancy (> 28 weeks), and there is no significant thrombocytopenia or liver enzyme elevation in AFLP.

B. Viral hepatitis is a common liver disorder caused by infections with hepatitis viruses. However, viral hepatitis typically presents at any time during pregnancy and is associated with a broader range of symptoms, including fever, malaise, and elevated liver enzymes.

D. ITP is a disorder of platelet destruction, resulting in thrombocytopenia. However, ITP is associated with a higher AST and ALT levels, while the patient presented here has normal liver enzyme levels.

**Clinical Pearls:**

1. HELLP syndrome is a severe complication of pregnancy occurring after 20 weeks of gestation.
2. It is characterized by thrombocytopenia, elevated liver enzymes, and hemolysis.
3. Atypical presentation and normal liver enzymes can lead to misdiagnosis, emphasizing the importance of considering this possibility in pregnant women presenting with jaundice, especially in late pregnancy.
4. The correct diagnosis requires a combination of clinical suspicion, elevated liver enzymes, thrombocytopenia, and hemolysis.

**Explanation of the question:**