A 45-year-old farmer from sub-Saharan Africa presents with weight loss, abdominal distension, and right upper quadrant pain. His medical history is significant for chronic hepatitis B infection. He mentions consuming home-stored maize regularly. Imaging reveals a liver mass with arterial enhancement and venous washout. His alpha-fetoprotein (AFP) level is elevated. What is the most likely environmental carcinogen contributing to this patient’s hepatocellular carcinoma?
