Giant Hepatocellular Carcinoma in a Young Adult Without Cirrhosis: A Case Report
Shamas Rafique, Iqra Rafiq, Saad A. Janjuah
Researchers' Journal of Internal Medicine.
Background: Hepatocellular carcinoma (HCC) is the most common primary malignancy of the liver and typically arises in patients with chronic liver disease and cirrhosis. The occurrence of HCC in young adults without underlying liver disease is uncommon and presents distinct diagnostic and therapeutic challenges. Case Presentation: A 23-year-old male with no significant past medical history presented with persistent right upper quadrant abdominal pain and anorexia. Laboratory investigations revealed mildly elevated liver enzymes and a significantly elevated alpha-fetoprotein (AFP) level of 817.9 ng/mL. Viral serology for hepatitis B and C was negative. Additional etiologic evaluation revealed no clinical evidence of metabolic syndrome, obesity, significant alcohol use, or family history of liver disease. Iron studies, ceruloplasmin testing, and alpha-1 antitrypsin deficiency evaluation were not available at the treating facility. Ultrasound and triphasic contrast-enhanced computed tomography demonstrated a large heterogeneous hepatic mass measuring approximately 20 cm involving segments IV, V, and VIII, with compression of adjacent hepatic vasculature but without definite vascular invasion or tumor thrombus. Imaging characteristics were categorized as LI-RADS 5. An ultrasound-guided liver biopsy confirmed well-differentiated hepatocellular carcinoma with positive CD34 and HepPar-1 immunostaining. Histopathology did not demonstrate lamellar fibrosis or morphologic features suggestive of fibrolamellar carcinoma. The tumor was deemed unresectable due to its size, bilobar involvement, and vascular compression. Following multidisciplinary tumor board evaluation, a combined treatment plan with transarterial chemoembolization (TACE) and systemic therapy with sorafenib was recommended. Immunotherapy-based combinations were not selected because treatment planning occurred in a setting where these regimens were not routinely available. Short-term follow-up is planned to assess the response. Conclusion: Although rare, hepatocellular carcinoma can occur in young individuals without cirrhosis or viral hepatitis. This case highlights the importance of maintaining clinical suspicion for HCC when evaluating large hepatic masses in young patients and emphasizes the importance of differentiating conventional HCC from fibrolamellar carcinoma in atypical presentations. Multidisciplinary evaluation remains critical in determining appropriate management strategies for advanced unresectable disease.