Hepatitis C: prognosis, genotypes, and life expectancy

In 1989, viral RNA characteristic of flaviviruses was found in the blood of patients with hepatitis "neither A nor B," and the causative agent was named the hepatitis C virus. This discovery was awarded the Nobel Prize in 2020. Since then, medicine has learned a great deal about the virus, but for a person with the diagnosis, the main questions remain the same: how long will they live and what will happen to their liver.

Chronic viral hepatitis C: how it progresses

Hepatitis C is inflammation of the liver caused by the HCV virus, which is transmitted through contact with the blood of an infected person. The acute infection lasts up to six months, and sometimes the body clears it on its own, but approximately 80% of those who survive infection develop a chronic infection with viral replication for at least six months. For decades, most patients feel no symptoms or notice only fatigue and a moderate decline in cognitive performance. Liver enzyme levels remain normal in 7–53% of patients, so how a person feels does not reflect the state of the liver. Many people live with the virus for 20–40 years without becoming seriously ill.

What the prognosis and life expectancy depend on

How long a person lives with hepatitis C cannot be predicted from a single test. Progression of liver fibrosis is nonlinear and usually takes 20–40 years from the time of infection, and in some patients the process is extremely slow. Twenty to thirty years after infection, the probability of cirrhosis is estimated at a range of 4 to 45%. The risk is higher in men, in people with concomitant hepatitis B, HIV, or schistosomiasis, and in those who abuse alcohol: with hepatitis C, alcohol abuse increases the risk of cirrhosis 100-fold. Modern antiviral drugs cure most cases, and early diagnosis and treatment prevent complications.

Hepatitis C virus genotypes: what they mean

There are 8 known genotypes of the virus, which are divided into more than 100 subtypes. A genotype is a genetic variant of the virus. Worldwide, about 71 million people are chronically infected with HCV and are at risk of cirrhosis and liver cancer; more than 350,000 die each year from liver diseases related to hepatitis C.

The number of genotypes and subtypes alone does not make it possible to state a life expectancy — it depends on the condition of the liver (see above).

Complications: fibrosis, cirrhosis, and liver cancer

Without treatment, hepatitis C can lead to cirrhosis, liver failure, and liver cancer. Worldwide, hepatitis C is responsible for 27% of cirrhosis cases and 25% of hepatocellular carcinoma; with developing cirrhosis, the risk of such a tumor is 20 times higher, and transformation occurs at a rate of 1–3% per year. Cirrhosis can cause portal hypertension, ascites, bleeding from varicose veins, jaundice, and hepatic encephalopathy. Steatohepatitis occurs in approximately half of infected individuals and usually precedes cirrhosis.

Routes of transmission and diagnosis

The virus can be transmitted to a child from a mother with HCV. Infection occurs through contact with the blood of an infected person, including through unsterile tattoo and piercing instruments and shared razors and toothbrushes. There is no vaccine against hepatitis C. Diagnosis relies on an epidemiological history, blood tests for antibodies to the virus, liver enzymes, and, if necessary, liver ultrasound and biopsy.

Acute hepatitis C in the first 1–3 months after infection may manifest as follows:

• Fatigue or worsening concentration without an obvious cause
• Dark urine and grayish or clay-colored stool
• Yellowing of the skin and whites of the eyes
• Abdominal pain, nausea, loss of appetite
• Fever and joint pain

Having hepatitis C alone is not a reason to call an ambulance; call 103 or 112 if vomiting blood appears, the stool becomes very dark or black, or sudden confusion or slurred speech occurs.

This article is for reference: it explains how the conversation about prognosis is structured but does not replace consultation with a doctor, who will assess your liver and your situation specifically.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer