You'll usually see it in a notice, transfer order, or case update that says your lawsuit was "sent to the MDL" or that a motion is pending before the "Judicial Panel on Multidistrict Litigation." That panel is a group of federal judges that decides whether civil cases filed in different federal courts should be gathered before one judge for coordinated pretrial work. The legal authority is 28 U.S.C. § 1407, and the body making that call is the Judicial Panel on Multidistrict Litigation, often shortened to the JPML.

What that means in plain English: if a lot of people around the country say they were hurt by the same drug, product, device, or disaster, the panel can centralize those cases so one court handles shared issues like discovery, expert fights, and motion practice. It is not the same thing as a class action. Your case stays your case, even if it gets swept into a bigger machine.

For an injury claim, that machine can cut both ways. Centralization can force a defendant to stop playing hide-the-ball in fifty different courts. It can also slow your case down, bury it in a pile, and pressure injured people into waiting while "bellwether" cases go first. If a Kentucky case filed in federal court gets pulled into an MDL, the transfer changes where pretrial work happens, not the underlying state-law issues like damages, causation, or the statute of limitations.