LONDON, Ontario For patients with Crohn's disease, omega 3 free fatty acids do not help avoid a relapse, two large, multicenter trials found.

ATLANTA Four of every 10 people who should be tested for colorectal cancer are not being screened within the suggested timeframe, the CDC said.

ROCKVILLE, Md. The FDA today approved natalizumab Tysabri , the star crossed multiple sclerosis agent, for refractory moderate to severe Crohn's disease showing evidence of inflammation.

PARIS There's more evidence that childhood immunization against hepatitis B virus infection does not increase the risk of multiple sclerosis, found a case control study here.

BOSTON Intravenous N acetylcysteine NAC , an antidote in acetaminophen poisoning, appears to work in cases of non acetaminophen acute liver failure as well, at least for patients in early grade coma.