If complications cannot be controlled or when the liver ceases functioning, liver transplantation is necessary. Survival from liver transplantation has been improving over the 1990s, and the five-year survival rate is now around 80%. The survival rate depends largely on the severity of disease and other medical risk factors in the recipient. In the United States, the MELD score is used to prioritize patients for transplantation. Transplantation necessitates the use of immune suppressants (ciclosporin or tacrolimus).

Generally, liver damage from cirrhosis cannot be reversed, but treatment can stop or delay further progression and reduce complications. A healthy diet is encouraged, as cirrhosis may be an energy-consuming process. Close follow-up is often necessary. Antibiotics are prescribed for infections, and various medications can help with itching. Laxatives, such as lactulose, decrease the risk of constipation; their role in preventing encephalopathy is limited.

Alcoholic cirrhosis caused by alcohol abuse is treated by abstaining from alcohol. Treatment for hepatitis-related cirrhosis involves medications used to treat the different types of hepatitis, such as interferon for viral hepatitis and corticosteroids for autoimmune hepatitis. Cirrhosis caused by Wilson's disease, in which copper builds up in organs, is treated with chelation therapy (for example, penicillamine) to remove the copper.

A 2006 Cochrane review did not find evidence sufficient for the use of androgenic anabolic steroids. Corticosteroids are sometimes used; however, this is recommended only when severe liver inflammation is present.

Sylimarin has been investigated as a possible treatment, with ambiguous results. One review claimed benefit for S-adenosyl methionine in disease models.

The effects of anti–tumor necrosis factor medications such as infliximab and etanercept are unclear and possibly harmful. Evidence is unclear for pentoxifylline. Propylthiouracil may result in harm.

Evidence does not support supplemental nutrition in liver disease.

Not drinking further alcohol is the most important part of treatment. People with chronic HCV infection should abstain from any alcohol intake, due to the risk for rapid acceleration of liver disease.

The treatment of chronic liver disease depends on the cause. Specific conditions may be treated with medications including corticosteroids, interferon, antivirals, bile acids or other drugs. Supportive therapy for complications of cirrhosis include diuretics, albumin, vitamin K, blood products, antibiotics and nutritional therapy. Other patients may require surgery or a transplant. Transplant is required when the liver fails and there is no other alternative.

Clinical practice guidelines by the American College of Gastroenterology have recommended corticosteroid treatment. Patients should be risk stratified using a MELD Score or Child-Pugh score.

- Corticosteroids: These guidelines suggest that patients with a modified Maddrey's discriminant function score > 32 or hepatic encephalopathy should be considered for treatment with prednisolone 40 mg daily for four weeks followed by a taper. Models such as the Lille Model can be used to monitor for improvement or to consider alternative treatment.

- Pentoxifylline: A randomized controlled trial found that among patients with a discriminant function score > 32 and at least one of the following symptoms (a palpable, tender enlarged liver, fever, high white blood cell count, hepatic encephalopathy, or hepatic systolic bruit), 4.6 patients must be treated with pentoxifylline for 4 weeks to prevent one patient from dying. Subsequent trials have suggested that pentoxifylline may be superior to prednisolone in the management of acute alcoholic hepatitis with discriminant function score >32. Advantage of pentoxifylline over prednisolone was better tolerability, lesser side effects, with decreased occurrence of renal dysfunction in patients receiving pentoxifylline.

- Potential for combined therapy: A large prospective study of over 1000 patients investigated whether prednisolone and pentoxifylline produced benefits when used alone or in combination. Pentoxifylline did not improve survival alone or in combination. Prednisolone gave a small reduction in mortality at 28 days but this did not reach significance, and there were no improvements in outcomes at 90 days or 1 year.

Many herbal and antioxidant remedies have been advocated for chronic liver disease but the evidence is not conclusive. Some support may be found in the orthodox medical use of two of these: N-acetyl cysteine (NAC), is the treatment of choice for acetaminophen overdose; both NAC and milk-thistle (Silybum marianum) or its derivative silibinin are used in liver poisoning from certain mushrooms, notably amanita phalloides, although the use of milk-thistle is controversial. Some common herbs are known or suspected to be harmful to the liver, including black cohosh, ma huang, chaparral, comfrey, germander, greater celandine, kava, mistletoe, pennyroyal, skull cap and valerian.

Anti-viral medications are available to treat infections such as hepatitis B. Other conditions may be managed by slowing down disease progression, for example:

- By using steroid-based drugs in autoimmune hepatitis.

- Regularly removing a quantity of blood from a vein (venesection) in the iron overload condition, hemochromatosis.

- Wilson’s disease, a condition where copper builds up in the body, can be managed with drugs which bind copper allowing it to be passed from your body in urine.

- In cholestatic liver disease, (where the flow of bile is affected due to cystic fibrosis) a medication called ursodeoxycholic acid (URSO, also referred to as UDCA) may be given.

There is no known cure, but medication may slow the progression so that a normal lifespan and quality of life may be attainable for many patients.

- Ursodeoxycholic acid (Ursodiol) is the most frequently used treatment. It helps reduce the cholestasis and improves liver function tests. It has a minimal effect on symptoms and whether it improves outcomes is controversial. A Cochrane review from 2012 did not show any significant benefits on important outcomes including mortality, liver transplantation or PBC symptoms, even if some biochemistry and histological parameters were improved.

- To relieve itching caused by bile acids in circulation, which are normally removed by the liver, cholestyramine (a bile acid sequestrant) may be prescribed to absorb bile acids in the gut and be eliminated, rather than re-enter the blood stream. Other drugs that do this include stanozolol, naltrexone and rifampicin.

- Specific treatment for fatigue, which may be debilitating in some patients, is limited and undergoing trials. Some studies indicate that Provigil (modafinil) may be effective without damaging the liver. Though modafinil is no longer covered by patents, the limiting factor in its use in the U.S. is cost. The manufacturer, Cephalon, has made agreements with manufacturers of generic modafinil to provide payments in exchange for delaying their sale of modafinil. The FTC has filed suit against Cephalon alleging anti-competitive behavior.

- People with PBC may have poor lipid-dependent absorption of Vitamins A, D, E, K. Appropriate supplementation is recommended when bilirubin is elevated.

- People with PBC are at elevated risk of developing osteoporosis and esophageal varices as compared to the general population and others with liver disease. Screening and treatment of these complications is an important part of the management of PBC.

- As in all liver diseases, consumption of alcohol is contraindicated.

- In advanced cases, a liver transplant, if successful, results in a favorable prognosis.

- The farnesoid X receptor agonist, obeticholic acid, which is a modified bile acid, was approved by the United States Food and Drug Administration on May 27, 2016, as an orphan drug in an accelerated approval program, based on its reduction in the level of the biomarker alkaline phosphatase, as a surrogate endpoint for clinical benefit. It is indicated for the treatment of PBC in combination with ursodeoxycholic acid in adults with an inadequate response to UDCA, or as monotherapy in adults unable to tolerate UDCA. Additional studies are being required to prove its clinical benefit.

There is no specific treatment for neonatal hepatitis. Vitamin supplements are usually prescribed and many infants are given phenobarbital, a drug used to control seizures, but which also stimulates the liver to excrete additional bile. Formulas containing more easily digested fats are also given to the infant.

Neonatal hepatitis caused by the hepatitis A virus also usually resolves itself within six months, but cases that are the result of infection with the hepatitis B or hepatitis C viruses most likely will result in chronic liver disease. Infants who develop cirrhosis ultimately will need a liver transplant.

Lactulose and lactitol are disaccharides that are not absorbed from the digestive tract. They are thought to decrease the generation of ammonia by bacteria, render the ammonia inabsorbable by converting it to ammonium (NH) ions, and increase transit of bowel content through the gut. Doses of 15-30 ml are administered three times a day; the result is aimed to be 3–5 soft stools a day, or (in some settings) a stool pH of <6.0. Lactulose may also be given by enema, especially if encephalopathy is severe. More commonly, phosphate enemas are used. This may relieve constipation, one of the causes of encephalopathy, and increase bowel transit.

Lactulose and lactitol are beneficial for treating hepatic encephalopathy, and are the recommended first-line treatment. Lactulose does not appear to be more effective than lactitol for treating people with hepatic encephalopathy. Side effects of lactulose and lactitol include the possibility of diarrhea, bloating, flatulence, and nausea. In acute liver failure, it is unclear whether lactulose is beneficial. The possible side effect of bloating may interfere with a liver transplant procedure if required.

The antibiotic rifaximin may be recommended in addition to lactulose for those with recurrent disease. It is a nonabsorbable antibiotic from the rifamycin class. This is thought to work in a similar way to other antibiotics, but without the complications attached to neomycin or metronidazole. Due to the long history and lower cost of lactulose use, rifaximin is generally only used as a second-line treatment if lactulose is poorly tolerated or not effective. When rifaximin is added to lactulose, the combination of the two may be more effective than each component separately. Rifaximin is more expensive than lactulose, but the cost may be offset by reduced hospital admissions for encephalopathy.

The antibiotics neomycin and metronidazole are other antibiotics used to treat hepatic encephalopathy. The rationale of their use was the fact that ammonia and other waste products are generated and converted by intestinal bacteria, and killing these bacteria would reduce the generation of these waste products. Neomycin was chosen because of its low intestinal absorption, as neomycin and similar aminoglycoside antibiotics may cause hearing loss and kidney failure if used by injection. Later studies showed that neomycin was indeed absorbed when taken by mouth, with resultant complications. Metronidazole, similarly, is less commonly used because prolonged use can cause nerve damage, in addition to gastrointestinal side effects.

No pharmacologic treatment has been approved by the U.S. Food and Drug Administration for PSC. Some experts recommend a trial of ursodeoxycholic acid (UDCA), a bile acid occurring naturally in small quantities in humans, as it has been shown to lower elevated liver enzyme numbers in patients with PSC and has proven effective in other cholestatic liver diseases. However, UDCA has yet to be shown to clearly lead to improved liver histology and survival. Guidelines from the American Association for the Study of Liver Diseases and the American College of Gastroenterology do not support the use of UDCA but guidelines from the European Association for the Study of the Liver do endorse the use of moderate doses (13-15 milligrams per kilogram) of UDCA for PSC.

Supportive treatment for PSC symptoms is the cornerstone of management. These therapies are aimed at relieving symptoms such as itching with antipruritics (e.g. bile acid sequestrants such as (cholestyramine)); antibiotics to treat episodes of acute cholangitis; and vitamin supplements, as people with PSC are often deficient in fat-soluble vitamins (vitamin A, vitamin D, vitamin E, and vitamin K).

ERCP and specialized techniques may also be needed to help distinguish between a benign PSC stricture and a bile duct cancer (cholangiocarcinoma).

Liver transplantation is the only proven long-term treatment of PSC, although only a fraction of individuals with PSC will need it. Indications for transplantation include recurrent bacterial cholangitis, decompensated cirrhosis, hepatocellular carcinoma, hilar cholangiocarcinoma, and complications of portal hypertension. Not all patients are candidates for liver transplantation, and some will experience disease recurrence afterward.

Chronic hepatitis B management aims to control viral replication, which is correlated with progression of disease. There have been 7 drug treatments approved to date in the United States:

- Injectable interferon alpha was the first therapy approved for chronic hepatitis B. It has several side effects, most of which are reversible with removal of therapy, but it has been supplanted by newer treatments for this indication. These include long-acting interferon bound to polyethylene glycol (pegylated interferon) and the oral nucleoside analogues.

- Pegylated interferon (PEG IFN) is dosed just once a week as a subcutaneous injection and is both more convenient and effective than standard interferon. Although it does not develop resistance as do many of the oral antivirals, it is poorly tolerated and requires close monitoring. PEG IFN is estimated to cost about $18,000 per year in the United States, compared to $2,500-8,700 for the oral medications; however, its treatment duration is 48 weeks as opposed to the oral antivirals, which require indefinite treatment for most patients (minimum 1 year). PEG IFN is not effective in patients with high levels of viral activity and cannot be used in immunosuppressed patients or those with cirrhosis.

- Lamivudine was the first approved oral nucleoside analogue. While effective and potent, lamivudine has been replaced by newer, more potent treatments in the Western world and is no longer recommended as first-line treatment. However, it is still used in areas where newer agents either have not been approved or are too costly. Generally, the course of treatment is a minimum of one year with a minimum of six additional months of "consolidation therapy." Based on viral response, longer therapy may be required, and certain patients require indefinite long-term therapy. Due to a less robust response in Asian patients, consolidation therapy is recommended to be extended to at least a year. All patients should be monitored for viral reactivation, which if identified, requires restarting treatment. Lamivudine is generally safe and well-tolerated. Many patients develop resistance, which is correlated with longer treatment duration. If this occurs, an additional antiviral is added. Lamivudine as a single treatment is contraindicated in patients coinfected with HIV, as resistance develops rapidly, but it can be used as part of a multidrug regimen.

- Adefovir dipivoxil, a nucleotide analogue, has been used to supplement lamivudine in patients who develop resistance, but is no longer recommended as first-line therapy.

- Entecavir is safe, well tolerated, less prone to developing resistance, and the most potent of the existing hepatitis B antivirals; it is thus a first-line treatment choice. It is not recommended for lamivudine-resistant patients or as monotherapy in patients who are HIV positive.

- Telbivudine is effective but not recommended as first-line treatment; as compared to entecavir, it is both less potent and more resistance prone.

- Tenofovir is a nucleotide analogue and an antiretroviral drug that is also used to treat HIV infection. It is preferred to adefovir both in lamivudine-resistant patients and as initial treatment since it is both more potent and less likely to develop resistance.

First-line treatments currently used include PEG IFN, entecavir, and tenofovir, subject to patient and physician preference. Treatment initiation is guided by recommendations issued by The American Association for the Study of Liver Diseases (AASLD) and the European Association for the Study of the Liver (EASL) and is based on detectable viral levels, HBeAg positive or negative status, ALT levels, and in certain cases, family history of HCC and liver biopsy. In patients with compensated cirrhosis, treatment is recommended regardless of HBeAg status or ALT level, but recommendations differ regarding HBV DNA levels; AASLD recommends treating at DNA levels detectable above 2x10 IU/mL; EASL and WHO recommend treating when HBV DNA levels are detectable at any level. In patients with decompensated cirrhosis, treatment and evaluation for liver transplantation are recommended in all cases if HBV DNA is detectable. Currently, multidrug treatment is not recommended in treatment of chronic HBV as it is no more effective in the long term than individual treatment with entecavir or tenofovir.

Similar to hepatitis A, treatment of hepatitis E is supportive and includes rest and ensuring adequate nutrition and hydration. Hospitalization may be required for particularly severe cases or for pregnant women.

Treatment of hepatocellular carcinoma varies by the stage of disease, a person's likelihood to tolerate surgery, and availability of liver transplant:

1. Curative intention: for limited disease, when the cancer is limited to one or more areas of within the liver, surgically removing the malignant cells may be curative. This may be accomplished by resection the affected portion of the liver (partial hepatectomy) or in some cases by orthotopic liver transplantation of the entire organ.

2. "Bridging" intention: for limited disease which qualifies for potential liver transplantation, the person may undergo targeted treatment of some or all of the known tumor while waiting for a donor organ to become available.

3. "Downstaging" intention: for moderately advanced disease which has not spread beyond the liver, but is too advanced to qualify for curative treatment. The person may be treated by targeted therapies in order to reduce the size or number of active tumors, with the goal of once again qualifying for liver transplant after this treatment.

4. Palliative intention: for more advanced disease, including spread of cancer beyond the liver or in persons who may not tolerate surgery, treatment intended to decrease symptoms of disease and maximize duration of survival.

Loco-regional therapy (also referred to as liver-directed therapy) refers to any one of several minimally-invasive treatment techniques to focally target HCC within the liver. These procedures are alternatives to surgery, and may be considered in combination with other strategies, such as a later liver transplantation. Generally, these treatment procedures are performed by interventional radiologists or surgeons, in coordination with a medical oncologist. Loco-regional therapy may refer to either percutaneous therapies (e.g. cryoablation), or arterial catheter-based therapies (chemoembolization or radioembolization).

Treatment with antiviral medication is recommended in all people with proven chronic hepatitis C who are not at high risk of dying from other causes. People with the highest complication risk should be treated first, with the risk of complications based on the degree of liver scarring. The initial recommended treatment depends on the type of hepatitis C virus and whether or not a person has cirrhosis.

- HCV genotype 1a (no cirrhosis): 12 weeks of elbasvir/grazoprevir, ledipasvir/sofosbuvir, or sofosbuvir/velpatasvir. Sofosbuvir with either daclatasvir or simeprevir may also be used.

- HCV genotype 1a (with cirrhosis): 12 weeks of elbasvir/grazoprevir, ledipasvir/sofosbuvir, or sofosbuvir/velpatasvir.

- HCV genotype 1b (no cirrhosis): 12 weeks of elbasvir/grazoprevir, ledipasvir/sofosbuvir, or sofosbuvir/velpatasvir. Sofosbuvir with either daclatasvir or simeprevir may also be used.

- HCV genotype 1b (with cirrhosis): 12 weeks of elbasvir/grazoprevir, ledipasvir/sofosbuvir, or sofosbuvir/velpatasvir.

- HCV genotype 2 (with or without cirrhosis): 12 weeks of sofosbuvir/velpatasvir.

- HCV genotype 3 (no cirrhosis): 12 weeks of sofosbuvir/velpatasvir or daclatasvir and sofosbuvir.

- HCV genotype 3 (with cirrhosis): 12 weeks of sofosbuvir/velpatasvir or 24 weeks of daclatasvir and sofosbuvir.

- HCV genotype 4 (with and without cirrhosis): 12 weeks of elbasvir/grazoprevir, ledipasvir/sofosbuvir, or sofosbuvir/velpatasvir.

- HCV genotype 5 or 6: 12 weeks of sofosbuvir/velpatasvir or ledipasvir/sofosbuvir.

Chronic infection can be cured about 95% of the time with recommended treatment in 2017. Getting access to these treatments however can be expensive. The combination of sofosbuvir, velpatasvir, and voxilaprevir may be used in those who have previously been treated with sofosbuvir or other drugs that inhibit NS5A and were not cured.

Prior to 2011, treatments consisted of a combination of pegylated interferon alpha and ribavirin for a period of 24 or 48 weeks, depending on HCV genotype. This produces cure rates of between 70 and 80% for genotype 2 and 3, respectively, and 45 to 70% for genotypes 1 and 4. Adverse effects with these treatments were common, with half of people getting flu like symptoms and a third experiencing emotional problems. Treatment during the first six months is more effective than once has become chronic.

Treatment may involve the prescription of immunosuppressive glucocorticoids such as prednisone, with or without azathioprine, and remission can be achieved in up to 60–80% of cases, although many will eventually experience a relapse. Budesonide has been shown to be more effective in inducing remission than prednisone, and result in fewer adverse effects. Those with autoimmune hepatitis who do not respond to glucocorticoids and azathioprine may be given other immunosuppressives like mycophenolate, ciclosporin, tacrolimus, methotrexate, etc. Liver transplantation may be required if patients do not respond to drug therapy or when patients present with fulminant liver failure.

HCV induces chronic infection in 80% of infected persons. Approximately 95% of these clear with treatment. In rare cases, infection can clear without treatment. Those with chronic are advised to avoid medications toxic to the liver and alcohol. They should be vaccinated against hepatitis A and hepatitis B. Use of acetaminophen is generally considered safe at reduced doses. Nonsteroidal anti-inflammatory drugs (NSAIDs) are not recommended in those with advanced liver disease due to an increased risk of bleeding. Ultrasound surveillance for hepatocellular carcinoma is recommended in those with accompanying cirrhosis. Coffee consumption has been associated with a slower rate of liver scarring in those infected with HCV.

Surgical removal of the tumor is associated with better cancer prognosis, but only 10-15% of patients are suitable for surgical resection due to the extent of disease or poor liver function. Surgery is only considered if the entire tumor can be safely removed while preserving sufficient functional liver to maintain normal physiology. Thus, pre-operative imaging assessment is critical in order to determine both the extent of HCC and to estimate the amount of residual liver remaining after surgery. In order to maintain liver function, residual liver volume should exceed 25% of total liver volume in a non-cirrhotic liver, greater than 40% in a cirrhotic liver. Surgery on diseased or cirrhotic livers is generally associated with higher morbidity and mortality. The overall recurrence rate after resection is 50-60%. The Singapore Liver Cancer Recurrence (SLICER) score can be used to estimate risk of recurrence after surgery.

Treatment of lung disease may include bronchodilators, inhaled steroids, and when infections occur antibiotics. Intravenous infusions of the A1AT protein or in severe disease lung transplantation may also be recommended. In those with severe liver disease liver transplantation may be an option. Avoiding smoking and vaccination for influenza, pneumococcus, and hepatitis is also recommended.

People with lung disease due to A1AD may receive intravenous infusions of alpha-1 antitrypsin, derived from donated human plasma. This augmentation therapy is thought to arrest the course of the disease and halt any further damage to the lungs. Long-term studies of the effectiveness of A1AT replacement therapy are not available. It is currently recommended that patients begin augmentation therapy only after the onset of emphysema symptoms.

As of 2015 there are four IV augmentation therapy manufacturers in the United States, Canada, and several European countries. Intravenous (IV) therapies are the standard mode of augmentation therapy delivery. Researchers are exploring inhaled therapies. IV augmentation therapies are manufactured by the following companies and have been shown to be clinically identical to one another in terms of dosage and efficacy.

Augmentation therapy is not appropriate for people with liver disease; treatment of A1AD-related liver damage focuses on alleviating the symptoms of the disease. In severe cases, liver transplantation may be necessary.

Non-alcoholic steatohepatitis is fatty liver disease due to causes other than alcohol. No pharmacological treatment has received approval as of 2015 for NASH. Some studies suggest diet, exercise, and antiglycemic drugs may alter the course of the disease. General recommendations include improving metabolic risk factors and reducing alcohol intake. NASH was first described in 1980 in a series of patients of the Mayo Clinic. Its relevance and high prevalence were recognized mainly in the 1990s. Some think NASH is a diagnosis of exclusion, and many cases may in fact be due to other causes.

Early diagnosis is vital as the late effects of iron accumulation can be wholly prevented by periodic phlebotomies (by venesection) comparable in volume to blood donations. Initiation of treatment is recommended when ferritin levels reach 500 milligrams per litre.

Phlebotomy (or bloodletting) is usually done at a weekly interval until ferritin levels are less than 50 milligrams per litre. In order to prevent iron reaccumulation, subsequent phlebotomies are normally carried out approximately once every three to four months for males, and twice a year for females.

Partial surgical resection is the optimal treatment for hepatocellular carcinoma (HCC) when patients have sufficient hepatic function reserve. Increased risk of complications such as liver failure can occur with resection of cirrhotic (i.e. less-than-optimally functional) livers. 5-year survival rates after resection have massively improved over the last few decades and can now exceed 50%. However, recurrence rates after resection can exceed 70%, whether due to spread of the initial tumor or formation of new tumors . Liver transplantation can also be considered in cases of HCC where this form of treatment can be tolerated and the tumor fits specific criteria (such as the Milan criteria). In general, patients who are being considered for liver transplantation have multiple hepatic lesions, severe underlying liver dysfunction, or both. Less than 30-40% of individuals with HCC are eligible for surgery and transplant because the cancer is often detected at a late stage. Also, HCC can progress during the waiting time for liver transplants, which can prevent transplant due to the strict criteria.

Percutaneous ablation is the only non-surgical treatment that can offer cure. There are many forms of percutaneous ablation, which consist of either injecting chemicals into the liver (ethanol or acetic acid) or producing extremes of temperature using radio frequency ablation, microwaves, lasers or cryotherapy. Of these, radio frequency ablation has one of the best reputations in HCC, but the limitations include inability to treat tumors close to other organs and blood vessels due to heat generation and the heat sink effect, respectively. In addition, long-term of outcomes of percutaneous ablation procedures for HCC have not been well studied. In general, surgery is the preferred treatment modality when possible.

Systemic chemotherapeutics are not routinely used in HCC, although local chemotherapy may be used in a procedure known as transarterial chemoembolization. In this procedure, cytotoxic drugs such as doxorubicin or cisplatin with lipiodol are administered and the arteries supplying the liver are blocked by gelatin sponge or other particles. Because most systemic drugs have no efficacy in the treatment of HCC, research into the molecular pathways involved in the production of liver cancer produced sorafenib, a targeted therapy drug that prevents cell proliferation and blood cell growth. Sorafenib obtained FDA approval for the treatment of advanced hepatocellular carcinoma in November 2007. This drug provides a survival benefit for advanced HCC.

Radiotherapy is not often used in HCC because the liver is not tolerant to radiation. Although with modern technology it is possible to provide well-targeted radiation to the tumor, minimizing the dose to the rest of the liver. Dual treatments of radiotherapy plus chemoembolization, local chemotherapy, systemic chemotherapy or targeted therapy drugs may show benefit over radiotherapy alone.