A 58-year-old man with cirrhosis secondary to chronic hepatitis B presents with a 3 cm solitary nodule in the liver on imaging. Regarding the diagnostic criteria and pathological features of hepatocellular carcinoma (HCC), all of the following are true EXCEPT:

Question

Accepted Answer

B. The presence of capsular invasion is a favorable prognostic indicator in HCC. ## Diagnostic and Prognostic Features of HCC

### Pathological Characteristics

**Key Point:** HCC in cirrhotic livers typically exhibits a **trabecular growth pattern** with loss of normal hepatic architecture. The tumor is supplied by **unpaired arteries** (anomalous vessels without corresponding portal venules), a hallmark feature distinguishing HCC from benign nodules.

### Prognostic Factors in HCC

| Feature | Prognostic Significance | Clinical Relevance |
|---------|------------------------|--------------------|
| **Microvascular invasion (MVI)** | Poor prognosis | Independent predictor of early recurrence; affects treatment decisions |
| **Capsular invasion** | **Unfavorable** prognostic indicator | Associated with aggressive behavior and worse survival |
| **Gross vascular invasion** | Very poor prognosis | Contraindication to curative resection |
| **Tumor differentiation** | Well-differentiated better than poorly-differentiated | Guides treatment intensity |

**High-Yield:** Capsular invasion (breach of the fibrous capsule surrounding the tumor) is a **negative prognostic factor**, not favorable. It indicates more aggressive tumor behavior and is associated with higher recurrence rates and reduced survival.

### Diagnostic Criteria (AASLD/EASL)

**Clinical Pearl:** In a cirrhotic patient, HCC can be diagnosed non-invasively if:
- **Nodule >10 mm**: Requires arterial phase enhancement + washout on CT or MRI
- **Nodule 10–20 mm**: Requires both imaging modalities showing the above pattern, OR one imaging modality + elevated AFP
- **Nodule <10 mm**: Surveillance; biopsy if growth documented

Biopsy is reserved for nodules that do not meet imaging criteria or when diagnosis remains uncertain.

### Why Option 1 is Correct

Capsular invasion is an **unfavorable** (not favorable) prognostic indicator. It represents breach of the tumor capsule and is associated with aggressive behavior, higher recurrence rates, and worse overall survival. This statement reverses the true prognostic significance.

Answer

A. Microvascular invasion is an independent predictor of poor prognosis and early recurrence

Answer

C. HCC arising in cirrhotic livers typically shows a trabecular growth pattern with unpaired arteries

Answer

D. HCC can be diagnosed by imaging alone (CT/MRI) in nodules >10 mm with arterial enhancement and washout in cirrhotic livers

A 58-year-old man with cirrhosis secondary to chronic hepatitis B presents with a 3 cm solitary nodule in the liver on imaging. Regarding the diagnostic criteria and pathological features of hepatocellular carcinoma (HCC), all of the following are true EXCEPT:

Explanation

Diagnostic and Prognostic Features of HCC

Pathological Characteristics

Prognostic Factors in HCC

Diagnostic Criteria (AASLD/EASL)

Why Option 1 is Correct

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Feature	Prognostic Significance	Clinical Relevance
Microvascular invasion (MVI)	Poor prognosis	Independent predictor of early recurrence; affects treatment decisions
Capsular invasion	Unfavorable prognostic indicator	Associated with aggressive behavior and worse survival
Gross vascular invasion	Very poor prognosis	Contraindication to curative resection
Tumor differentiation	Well-differentiated better than poorly-differentiated	Guides treatment intensity