Primary hepatic alpha-fetoprotein-producing neuroendocrine neoplasm harboring FGFR2 and TP53 mutations: a case report and literature review.

This report presents a rare case of a 45-year-old man diagnosed with a primary hepatic alpha-fetoprotein-producing neuroendocrine neoplasm, a condition rarely reported in the literature. The patient presented with initial symptoms of back and epigastric pain, after which multiple liver lesions were discovered on contrast-enhanced computed tomography, suggesting intrahepatic cholangiocarcinoma. Histopathological and immunohistochemical analyses confirmed the diagnosis of alpha-fetoprotein-producing neuroendocrine neoplasm that was further supported by genetic testing, which revealed FGFR2 and TP53 mutations commonly encountered in intrahepatic cholangiocarcinoma. Despite receiving various chemotherapeutic regimens, the patient exhibited a progressive disease. This case underscores the importance of accurate differential diagnosis from hepatocellular carcinoma and intrahepatic cholangiocarcinoma due to differences in treatment approaches and prognoses and highlights the necessity for increased awareness of AFP-producing primary hepatic neuroendocrine neoplasms among clinicians and pathologists. It emphasizes the significance of comprehensive histopathological evaluation, immunohistochemical profiling, and genetic analysis for precise diagnosis and tailored therapeutic strategies. Further research is warranted to elucidate the molecular mechanisms underlying this rare liver tumor subtype and develop targeted treatments.