A 38-year-old man from rural India presents with jaundice, dark urine, and right upper quadrant pain. Investigations reveal elevated transaminases (ALT 2800 U/L, AST 2200 U/L), elevated bilirubin, and positive Anti-HCV antibody with detectable HCV RNA. Regarding hepatitis C pathogenesis and natural history, all of the following are true EXCEPT:

Explanation

## Hepatitis C Virus — Natural History and Pathogenesis ### Clinical Presentation of Acute HCV **Key Point:** Acute hepatitis C is typically **asymptomatic or mildly symptomatic** in 70–80% of cases. When symptoms occur, they are usually mild and non-specific. **Clinical Pearl:** Unlike acute hepatitis A or B, acute HCV infection rarely causes severe jaundice or fulminant hepatic failure. Most patients are unaware of acute infection and discover HCV seropositivity incidentally during screening or when chronic complications develop. ### Why Option 2 is Incorrect The statement claims that acute HCV typically presents with "severe jaundice and fulminant hepatic failure in the majority of infected individuals." This is **false**: - Fulminant hepatic failure from acute HCV is **extremely rare** (<1% of cases) - Severe jaundice is uncommon; most acute infections are subclinical or mild - The majority of patients have **no symptoms** at the time of acute infection ### Correct Statements | Feature | HCV | Relevance | |---------|-----|----------| | RNA-dependent RNA polymerase fidelity | Error-prone, high mutation rate | Enables viral escape, chronic infection | | Acute infection symptomatology | Asymptomatic or mild in 70–80% | Contrasts with HAV/HBV | | Immune targets | Core, NS3, NS5 antigens | Subject to viral escape mutations | | Chronic infection outcome | 70–85% develop chronicity | Leads to fibrosis, cirrhosis, HCC | | Fulminant hepatic failure | Rare (<1%) | NOT typical of acute HCV | ### Mnemonic for Viral Hepatitis Severity in Acute Phase **"HAV Mild, HBV Moderate, HCV Minimal"** — Acute HCV is the least likely to cause severe acute hepatitis or fulminant failure. **High-Yield:** This is a high-frequency NEET PG trap. Students often confuse HCV with HAV or HBV. Remember: **acute HCV is usually silent**; the danger lies in **chronic infection** (fibrosis, cirrhosis, HCC). [cite:Harrison 21e Ch 298; Robbins 10e Ch 18]