Hepatocellular Carcinoma Pathology: Grading, Types & Diagnosis

Pathology is the study of how hepatocellular carcinoma (HCC) looks and behaves at the tissue and cellular level. Understanding the pathology of a tumor helps doctors predict how aggressive it may be and guides treatment decisions.

Tumor Grade (Differentiation)

HCC is graded by how closely the cancer cells resemble normal liver cells:

• Well-differentiated — cells look close to normal; tends to grow more slowly
• Moderately differentiated — intermediate appearance and behavior
• Poorly differentiated — cells look very abnormal and tend to be more aggressive

Growth Patterns and Microvascular Invasion

Pathologists also note the tumor's growth pattern and whether there is microvascular invasion — cancer cells inside small blood vessels. Microvascular invasion is an important predictor of recurrence after surgery or transplant.

The Role of AFP and Biopsy

Alpha-fetoprotein (AFP) is a protein that is elevated in many people with HCC and can support the diagnosis. In a cirrhotic liver, HCC can often be diagnosed by characteristic imaging features on CT or MRI; a biopsy is reserved for cases where imaging is not conclusive.

This page is for general education and is not a substitute for evaluation by a qualified pathologist and treating physician.