Hepatocellular Carcinoma Arising from Ectopic Liver Tissue in the Left Triangular Ligament: A Case Report.

Accessory liver lobes represent an infrequent anatomical anomaly. The probability of hepatocellular carcinoma (HCC) developing in these accessory lobes remains exceptionally rare. Herein we report a case of a HCC arising from accessory liver lobe. A 63-year-old man came to our institution because of an abnormally elevated level of alpha-fetoprotein (AFP). There were no previous medical issues related to chronic liver disease or cirrhosis. Initially, MRI, PET-CT, and preventive interventions failed to detect tumor lesions. After conducting three follow-ups, it was concluded that the elliptical HCC was linked to the mother liver through a linear structure. This report shows when AFP levels continue to escalate without apparent etiology and routine examinations of the main liver reveal no conspicuous pathology, fastidious retrospective scrutiny of the anatomical elements encompassing the ectopic HCC or accessory liver should be undertaken.