A former CIA agent has lodged another appeal at Portugal's Constitutional Court against her extradition to Italy to serve a four-year sentence for her part in the U.S. extraordinary renditions program.

The court said Thursday that Sabrina de Sousa has asked it to appoint a three-judge panel to review a judge's decision last month to permit her extradition. Since her October arrest in Lisbon, De Sousa has lost her extradition fight at a lower court and her appeal of that decision to the Supreme Court. The Constitutional Court is her last hope.

De Sousa was among 26 Americans convicted in absentia for the 2003 kidnapping in Milan of terror suspect Osama Moustafa Hassan Nasr. She was arrested at Lisbon airport on a European warrant.