Toxin-Induced Autoimmune Hepatitis Caused by Raw Cashew Nuts

Area of Science:

• Hepatology
• Toxicology
• Immunology

Background:

• Autoimmune hepatitis (AIH) is a chronic liver disease characterized by immune system attack on liver cells.
• While drug-induced AIH is recognized, AIH triggered by food products remains poorly understood.
• Identifying environmental triggers is crucial for understanding and managing AIH.

Observation:

• A 64-year-old male presented with elevated liver enzymes 1 year after a rash potentially linked to raw cashew nut consumption.
• Liver biopsy findings were suggestive of toxin-induced autoimmune hepatitis.
• The patient had no prior medical history relevant to liver disease.

Findings:

• The patient's elevated liver enzymes normalized after treatment with azathioprine and prednisone.
• This case suggests a potential link between raw cashew nut ingestion and the development of autoimmune hepatitis.
• The histological features supported a diagnosis of toxin-induced autoimmune hepatitis.

Implications:

• This case expands the spectrum of known causes for autoimmune hepatitis beyond conventional drugs and supplements.
• It underscores the importance of considering food products as potential toxins triggering immune-mediated liver injury.
• Further research into the hepatotoxic potential of food products like raw cashew nuts is warranted.