Related Experiment Video
Updated: May 3, 2026

A Three-Dimensional Spheroid Model to Investigate the Tumor-Stromal Interaction in Hepatocellular Carcinoma
Published on: September 30, 2021
Distinct features in natural history and outcomes of acute hepatitis C
Chalermrat Bunchorntavakul1, Lisa M Jones, Masahiro Kikuchi
1*Department of Medicine, University of Pennsylvania ‡Department of Medicine, Division of Gastroenterology and Hepatology, Philadelphia VA Medical Center §Pennsylvania Hospital, Philadelphia, PA †Rajavithi Hospital, College of Medicine, Rangsit University, Bangkok, Thailand ∥VA New York Harbor Healthcare System, Brooklyn, NY.
Insights
Acute hepatitis C (AHCV) is a diverse condition requiring vigilance. Many patients lack clear risk factors, and presentations vary, necessitating careful monitoring for optimal outcomes.
Area of Science:
- Hepatology
- Virology
- Infectious Diseases
Background:
- Acute hepatitis C (AHCV) presents diagnostic challenges due to varied clinical manifestations.
- Identifying AHCV requires careful consideration of diverse patient presentations.
Purpose of the Study:
- To investigate the clinical and demographic characteristics of AHCV patients.
- To analyze treatment outcomes in patients with acute hepatitis C.
- To understand the diverse presentations and risk factors associated with AHCV.
Main Methods:
- Patients with suspected AHCV were identified from multiple hospital settings (2000-2010).
- Diagnosis was confirmed via ALT elevation, HCV-RNA fluctuations, and/or recent exposure, excluding HIV co-infection.
- Clinical and therapeutic outcomes were monitored for at least six months.
Main Results:
- 40 AHCV patients were enrolled, predominantly male (68%) and white (73%), with a median age of 43.
- Risk factors were diverse, including injection drug use (33%), healthcare exposure (20%), and unknown (45%).
- Spontaneous viral clearance occurred in 23%, 27% had persistent viremia without treatment, and 50% treated with interferon achieved 90% cure.
Conclusions:
- Acute hepatitis C is a heterogeneous disease demanding close patient monitoring.
- The high proportion of patients with unidentified risk factors and varied presentations underscores the need for diagnostic vigilance.
Background:
Acute hepatitis C (AHCV) provides a diagnostic challenge with diverse clinical presentations.
Goals:
This study was aimed to examine the clinical and demographic features as well as outcomes in AHCV patients identified from inpatient and outpatient hospital settings.
Study:
Patients with suspected AHCV were recruited from Philadelphia VA Medical Center, Hospital of University of Pennsylvania and Brooklyn VA Medical Center between 2000 and 2010. AHCV was diagnosed by acute serum alanine aminotransferase elevation with anti-hepatitis C virus (HCV) seroconversion, HCV-RNA fluctuations above 1 log, and/or recent high-risk exposure without prior HCV infection, excluding those with human immunodeficiency virus infection. Clinical and therapeutic outcomes were monitored for at least 6 months.
Results:
A total of 40 AHCV patients were enrolled with a median follow-up of 129 weeks. They were mostly men (68%) and whites (73%) with median age of 43 years, diverse risk factors (33% injection drugs, 20% health care-associated, 3% sexual, and 45% unknown), and wide variations in peak alanine aminotransferase (143 to 3435 U/L) and total bilirubin levels (0.4 to 19.3 mg/dL). Viremia resolved spontaneously in 23% and persisted without therapy in 27%, whereas 50% received interferon α-based therapy with 90% cure (18/20). Distinct clinical scenarios included: (1) wide viremic fluctuations >1 log (65%) and intermittent HCV-RNA negativity; (2) autoantibodies (25% antinuclear antibodies, 69% antismooth muscle antibodies) or autoimmune features; (3) delayed spontaneous viral clearance in 2 patients; (4) rapid cirrhosis progression in 2 patients.
Conclusions:
AHCV is a heterogenous disease that requires careful monitoring. The lack of apparent risk factor in high proportion of patients and its diverse presentations warrant diagnostic vigilance.
Related Concept Videos
Hepatitis
Viral Hepatitis I: Introduction
Cirrhosis I: Introduction
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test
Cirrhosis II: Pathophysiology
Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow

