The purpose of six-monthly ultrasound
She has cirrhosis caused by chronic hepatitis B, which places her at high risk of hepatocellular carcinoma (HCC). Clients with cirrhosis, and selected carriers of chronic hepatitis B, have ultrasound, with or without alpha-fetoprotein (AFP), every 6 months as surveillance for hepatocellular carcinoma. The accurate explanation is that the scan finds liver cancer early, while it is still treatable. Surveillance continues even when she feels well, because early tumors usually cause no symptoms.
Why early detection matters
HCC develops in livers damaged by chronic inflammation and regeneration. Chronic hepatitis B is a particularly important cause because the virus can promote cancer even before cirrhosis is advanced. A small tumor found on routine surveillance can often be treated with resection, ablation, or liver transplantation, all of which offer a chance of cure. A tumor found only after it causes pain, weight loss, or a palpable mass is usually too advanced for these options. The six-month interval is chosen to catch tumors while they are still small.
Why the other explanations are inaccurate
Measuring the amount of scarring is done with transient elastography, which assesses liver stiffness, not with routine surveillance ultrasound. Checking whether varices have grown is done by endoscopy, which allows varices to be seen directly and graded. Detecting fluid before it builds up is not the purpose here; her ascites is already known and managed clinically with diuretics and paracentesis.
| Question | Test used |
|---|
| Has liver cancer developed? | Ultrasound every 6 months, with or without AFP |
| How much fibrosis is present? | Transient elastography |
| Are varices present or enlarging? | Upper endoscopy |
| Is there ascites or infected fluid? | Clinical assessment, ultrasound, diagnostic paracentesis |
Nursing application
The nurse explains the purpose of surveillance in plain terms, emphasizes keeping every appointment even when she feels well, and reinforces other measures that reduce cancer risk, such as continuing antiviral treatment if prescribed and avoiding alcohol. The nurse also teaches her to report new abdominal pain, weight loss, or worsening jaundice.
Exam takeaway
Key point In cirrhosis or chronic hepatitis B, ultrasound every 6 months is cancer surveillance. Match each test to its purpose: elastography for fibrosis, endoscopy for varices.