A consolidated set of lawsuits over destroyed semen samples at Northwestern Memorial Hospital need more proceedings before a judge can determine whether the hospital’s excess insurer owes coverage, a state appeals panel ruled Friday.The decision from the 1st District Appellate Court holds open the possibility that Continental Casualty Co. could be on the hook and pay out damages in any of the 65 lawsuits that have been filed against the Northwestern Medical Faculty Foundation.The insurer sought a declaratory judgment …