The New Jersey Supreme Court on Wednesday said plaintiff expert testimony in a mass tort case alleging that the pharmaceutical giant Hoffmann-La Roche’s anti-acne drug Accutane led to development of Crohn’s disease was properly excluded.

The unanimous ruling, a reversal of the Appellate Division, is a major victory for Hoffmann-La Roche, which was defending more than 2,100 Accutane lawsuits in New Jersey, all of which were consolidated in Atlantic County. It reinstates the decision on admissibility originally issued by Superior Court Judge Nelson Johnson, who rejected the testimony of the plaintiffs’ experts.