BOSTON, Nov. 11, 2016 /PRNewswire/ -- A new study presented this week at The Liver Meeting® — held by the American Association for the Study of Liver Diseases — found patients with hepatitis C who take direct-acting antiviral medication are at no higher risk for developing liver cancer than those who do not take the medication. However, they might be at an increased for more aggressive, infiltrative patterns of cancer, should they develop it. "Data on clinical outcomes in cirrhotic patients with hepatitis C treated with direct-acting antiviral agents (DAAs) are still scanty and somehow controversial, and this is particularly true for development of a liver cancer, one of the most frequent and deadly complications of the disease," says Alfredo Alberti; professor of gastroenterology at University of Padova in Padova, Italy, and lead investigator in the study. Recent studies have suggested the possibility of increased risk of developing liver cancer (hepatocellular carcinoma, or HCC) during and after DAA treatment in patients with hepatitis C (HCV). Dr. Alberti's team recently looked at the incidence of new cases of liver cancer among 3,075 HCV patients with advanced liver disease who were treated with DAAs. Almost 70 percent of the patients studied were men, and nearly 86 percent had cirrhosis (scarring of the liver). HCV genotypes one through four were all represented in the study, and patients with a past history of liver cancer were excluded. All participants were treated with oral DAA therapy and monitored monthly. At the time of Dr. Alberti's team's analysis, patients had an average follow up of nearly 305 days from the time they started DAA therapy. During this period, the researchers found 41 patients had developed liver cancer, and the overall incidence (per 100 patient years) was 1.64.