A 52-year-old man with a 20-year history of hepatitis B presents with right upper quadrant pain and weight loss. Ultrasound shows a 3 cm heterogeneous lesion in the right lobe of the liver. Serum AFP is 450 ng/mL (normal <20 ng/mL). CT abdomen with contrast shows arterial phase enhancement and washout in the portal venous phase. What is the most appropriate next step in management?

Explanation

## Clinical Context This patient meets diagnostic criteria for hepatocellular carcinoma (HCC) in the setting of cirrhosis (implied by chronic hepatitis B) without need for tissue confirmation. ## Diagnostic Criteria for HCC **Key Point:** In patients with cirrhosis, HCC can be diagnosed non-invasively when imaging shows arterial phase enhancement with washout on multiphasic CT or MRI, especially when combined with elevated AFP. **High-Yield:** The AASLD (American Association for the Study of Liver Diseases) 2018 guidelines state that nodules >10 mm in cirrhotic livers meeting imaging criteria (arterial enhancement + venous/delayed washout) on a single imaging modality do NOT require biopsy confirmation if AFP is elevated (>400 ng/mL is particularly suggestive). ## Why Proceed to Treatment? | Feature | Finding in This Case | |---------|----------------------| | Nodule size | 3 cm (>10 mm) | | Imaging pattern | Arterial enhancement + washout | | AFP level | 450 ng/mL (markedly elevated) | | Cirrhosis status | Present (chronic HBV) | | Biopsy needed? | No | **Clinical Pearl:** In this scenario, delaying curative treatment (resection, transplantation, or ablation) for tissue confirmation is inappropriate and worsens prognosis. The combination of imaging hallmark + elevated AFP + cirrhosis is diagnostic. **Mnemonic: HCC Diagnosis in Cirrhosis — "AASLD Rule"** - **A**rterial enhancement + washout on one imaging modality (nodule >10 mm) = diagnostic - **A**lternatively, two imaging modalities showing enhancement (if nodule 10–20 mm) - **S**ystemic markers (AFP >400 ng/mL) support diagnosis - **L**iver cirrhosis context is essential - **D**o NOT biopsy if criteria met — proceed to treatment ## Management Algorithm ```mermaid flowchart TD A[Cirrhotic patient with nodule >10 mm]:::outcome --> B{Imaging shows arterial enhancement + washout?}:::decision B -->|Yes, single modality| C{AFP >400 ng/mL?}:::decision B -->|No or uncertain| D[Biopsy or follow-up imaging]:::action C -->|Yes| E[HCC diagnosed]:::outcome C -->|No| F[Still HCC if single imaging modality shows pattern]:::outcome E --> G{Candidate for curative treatment?}:::decision F --> G G -->|Yes| H[Resection, transplantation, or ablation]:::action G -->|No| I[Palliative/systemic therapy]:::action ```