What histologic features indicate hepatocellular carcinoma in a cirrhotic liver?

What histologic features indicate hepatocellular carcinoma in a cirrhotic liver?

• A. Gland-forming cells with mucin production.
• B. Signet-ring cells within mucin pools.
• C. Malignant hepatocytes arranged in thickened trabeculae or pseudoglandular patterns with invasion; often elevated AFP.
• D. Bile ductular proliferation with ductal reaction.

Answer: (C)

This item tests how hepatocellular carcinoma arising in a cirrhotic liver looks under the microscope and how that pattern distinguishes it from other hepatic tumors or reactive changes. In HCC, malignant hepatocytes tend to grow in thickened cords or trabeculae, often 2–3 cells thick, and can organize into pseudoglandular or acinar-like structures. These tumor cells invade surrounding tissue, including into vessels and the capsule, reflecting malignant behavior. The architecture is typically disrupted, with loss of the normal liver lobule arrangement and reticulin framework. AFP can be elevated in many cases, supporting the diagnosis when present. Other patterns described in the distractors point to different lesions: mucin-forming glandular structures suggest adenocarcinomas such as cholangiocarcinoma or metastatic mucinous carcinomas; signet-ring cells in mucin pools are characteristic of signet-ring cell carcinoma; ductular proliferation with ductal reaction reflects reactive/ductular changes seen in cirrhosis or cholangiocarcinoma, not classic HCC.

This item tests how hepatocellular carcinoma arising in a cirrhotic liver looks under the microscope and how that pattern distinguishes it from other hepatic tumors or reactive changes. In HCC, malignant hepatocytes tend to grow in thickened cords or trabeculae, often 2–3 cells thick, and can organize into pseudoglandular or acinar-like structures. These tumor cells invade surrounding tissue, including into vessels and the capsule, reflecting malignant behavior. The architecture is typically disrupted, with loss of the normal liver lobule arrangement and reticulin framework. AFP can be elevated in many cases, supporting the diagnosis when present.

Other patterns described in the distractors point to different lesions: mucin-forming glandular structures suggest adenocarcinomas such as cholangiocarcinoma or metastatic mucinous carcinomas; signet-ring cells in mucin pools are characteristic of signet-ring cell carcinoma; ductular proliferation with ductal reaction reflects reactive/ductular changes seen in cirrhosis or cholangiocarcinoma, not classic HCC.