• Clinical science

Hepatocellular carcinoma (Liver cancer…)

Abstract

Hepatocellular carcinoma (HCC) is a malignant, most often solitary tumor of the liver, which occurs primarily in patients with preexisting liver cirrhosis or chronic hepatitis. Typically, it is an incidental diagnosis in these high-risk patients that is made either via ultrasound or an increase in the hepatic tumor marker alpha-fetoprotein. Most patients typically present with symptoms caused by underlying disease (e.g., ascites, jaundice) rather than the tumor itself. Potentially curative treatment options include tumor resection, liver transplantation, and ablative therapies. Unfortunately, it is usually not possible to remove all tumor tissue, which explains the poor prognosis of HCC. In western countries, the five-year survival is less than 50%.

Epidemiology

  • Fifth most common malignancy worldwide
  • Highest incidence in Southeast Asia and Africa
  • Peak incidence in the US: 70–75 years
  • Peak incidence in Africa and Asia: 30–40 years
  • >

References:[1]

Epidemiological data refers to the US, unless otherwise specified.

Etiology

Aflatoxins are considered one of the most potent carcinogens!

References:[2][3]

Clinical features

  • Usually asymptomatic apart from symptoms of the underlying disease (mostly cirrhosis or hepatitis)
  • Metastasis is uncommon and usually only occurs in advanced stages
  • Possible symptoms in advanced disease
    • Weight loss, cachexia
    • Hepatomegaly and right upper quadrant tenderness
    • Ascites and jaundice

References:[3][4]

Diagnostics

Laboratory tests

In patients with cirrhosis of the liver or chronic hepatitis B/C infection, AFP is used as a screening test for HCC!

Imaging

Contrast-enhanced studies using ultrasound, MRI, or CT are most useful in the evaluation of a liver mass

Liver biopsy

  • Can provide a definitive diagnosis but carries the risk of bleeding and tumor spread
  • Recommended when both lab and imaging studies are inconclusive

References:[3][4]

Differential diagnoses

Malignant liver tumors

Benign liver tumors

References:[5][6]

The differential diagnoses listed here are not exhaustive.

Treatment

  • Curative therapeutic options: potentially for patients with retained liver function
  • Follow-up:
  • Palliative care: primarily for decompensated disease, unresectable, multinodular disease, or metastatic disease

#References:[7]

Prognosis

  • 5-year survival rate
    • Western countries: 27–49%
    • Asia and Africa: < 10%