Autoimmune Hepatitis: Histopathological Diversity and Its Clinical Implications

Area of Science:

• Hepatology
• Immunology
• Pathology

Background:

• Autoimmune hepatitis (AIH) is a chronic inflammatory liver disease with varied presentations.
• Accurate histopathology is vital for assessing AIH activity, treatment, and prognosis.
• AIH diagnosis is challenging due to overlapping features with drug-induced liver injury (DILI), viral hepatitis, and metabolic dysfunction-associated steatotic liver disease (MASLD).

Purpose of the Study:

• To review the characteristic histological features of AIH.
• To discuss key differential diagnoses for AIH.
• To address current diagnostic limitations in AIH.

Main Methods:

• Review of characteristic histological findings in AIH.
• Comparison of AIH histology with other liver diseases.
• Discussion of diagnostic challenges and limitations.

Main Results:

• AIH exhibits a broad histological spectrum that can mimic other liver conditions.
• Liver biopsy offers unique insights into hepatic injury patterns and bile duct involvement, crucial for diagnosis.
• Distinguishing AIH from coexisting liver diseases like MASLD is increasingly important.

Conclusions:

• Histopathological evaluation is essential for accurate AIH diagnosis and management.
• Differential diagnosis of AIH requires careful consideration of histological features and clinical context.
• Current diagnostic approaches for AIH face limitations, particularly in acute presentations and overlapping conditions.