Highlighting the first oral argument session after the official resignation of Justice Joan Orie Melvin are two of the bigger cases on the justices’ docket this year: a case over whether communications between attorneys and their expert witnesses are discoverable and one about when the statute of limitations starts running in a medical malpractice case where there are multiple potential causes of injury.

Barrick v. Holy Spirit Hospital, the attorney-expert communication case, is set to kick off the second day of a two-day argument session today before the court in Pittsburgh. Scheduled immediately after that on Wednesday is Garman v. Heine, which deals with whether, in light of the certificate of merit requirement, the statute of limitations in a medical malpractice case where there are multiple potential causes of an injury should toll upon confirmation of the specific cause of the injury or simply upon discovery that the injury was the result of someone else’s conduct.