Hepatocellular Carcinoma – Causes, Symptoms & Treatment
Hepatocellular carcinoma (HCC) is the most common primary liver cancer, typically developing in patients with chronic liver disease or cirrhosis. Early detection significantly improves treatment outcomes.
Wissenswertes über "Hepatocellular Carcinoma"
Hepatocellular carcinoma (HCC) is the most common primary liver cancer, typically developing in patients with chronic liver disease or cirrhosis. Early detection significantly improves treatment outcomes.
What is Hepatocellular Carcinoma?
Hepatocellular carcinoma (HCC) is a malignant tumor that originates in the liver cells (hepatocytes). It is one of the most common cancers worldwide and the most prevalent form of primary liver cancer. In the vast majority of cases, HCC develops against a background of pre-existing chronic liver disease or liver cirrhosis.
Causes and Risk Factors
HCC rarely arises in a healthy liver. The main risk factors include:
- Liver cirrhosis: The most common underlying condition, regardless of its cause.
- Chronic hepatitis B and C: Viral infections that cause long-term liver damage and significantly increase cancer risk.
- Alcoholic liver disease: Chronic excessive alcohol consumption leads to cirrhosis and elevated HCC risk.
- Non-alcoholic fatty liver disease (NAFLD/NASH): An increasingly common cause, associated with obesity, type 2 diabetes, and metabolic syndrome.
- Aflatoxin exposure: Mold-derived toxins found in contaminated food, particularly in tropical regions.
- Hereditary hemochromatosis and other metabolic disorders: Excessive iron storage in the liver promotes malignant transformation.
Symptoms
In its early stages, HCC often causes no or only nonspecific symptoms. As the disease progresses, the following symptoms may appear:
- Dull pain or pressure in the right upper abdomen
- Unintentional weight loss and loss of appetite
- General fatigue and weakness
- Yellowing of the skin and eyes (jaundice)
- Abdominal swelling due to fluid accumulation (ascites)
- Nausea and vomiting
- Palpable enlargement of the liver (hepatomegaly)
Diagnosis
The diagnosis of HCC is based on a combination of imaging studies, laboratory tests, and in some cases tissue sampling:
Imaging
- Ultrasound: Used as a surveillance tool every 6 months in high-risk patients.
- Computed tomography (CT) and magnetic resonance imaging (MRI): Provide detailed assessment of tumor size, characteristics, and possible spread.
Laboratory Tests
- Alpha-fetoprotein (AFP): A tumor marker that is frequently elevated in HCC, though not in all patients.
- Liver function tests (AST, ALT, bilirubin, prothrombin time) to assess overall liver health.
Biopsy
A liver biopsy (tissue sample) may be required to confirm the diagnosis when imaging findings are inconclusive.
Treatment
The choice of treatment depends on the tumor stage, liver function, and the overall condition of the patient. The following approaches are available:
Curative Treatment Options
- Surgical resection: Removal of the tumor; feasible when the tumor is localized and liver function is preserved.
- Liver transplantation: An option for patients with early-stage HCC and advanced cirrhosis; offers the best long-term outcomes.
- Radiofrequency ablation (RFA) and microwave ablation (MWA): Minimally invasive techniques that destroy small tumors using heat.
Palliative Treatment Options
- Transarterial chemoembolization (TACE): Combines local chemotherapy delivery with arterial occlusion to reduce tumor size.
- Systemic therapy: Tyrosine kinase inhibitors such as sorafenib or lenvatinib, as well as immunotherapy combinations (e.g., atezolizumab plus bevacizumab) for advanced-stage disease.
- Radiation therapy: Used in select cases as a supplementary measure.
Surveillance and Early Detection
Patients with known liver cirrhosis or chronic hepatitis B infection should undergo regular surveillance. Ultrasound every 6 months is recommended, optionally combined with AFP measurement. Early detection substantially improves treatment options and overall prognosis.
Prognosis
The prognosis of hepatocellular carcinoma depends greatly on the stage at diagnosis. In the early stages, curative therapies can achieve complete remission. In advanced stages, the disease is often no longer curable; however, modern treatment strategies can extend survival and improve quality of life.
References
- European Association for the Study of the Liver (EASL): EASL Clinical Practice Guidelines: Management of hepatocellular carcinoma. Journal of Hepatology, 2018.
- Llovet JM et al.: Hepatocellular carcinoma. Nature Reviews Disease Primers, 2021.
- American Association for the Study of Liver Diseases (AASLD): Diagnosis, Staging, and Management of Hepatocellular Carcinoma. Hepatology, 2018.
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