This prospective study was undertaken to address the capacity of positron emission tomography (PET) with 2-[18F]fluoro-2-deoxy-D-glucose (18F-FDG) to determine the primary tumour site of carcinomas with unknown primary site.
European Association for Research in Oncology, Department of Medical Oncology, Henri Mondor Hospital, Assistance Publique - Hopitaux de Paris, Lille, France. h-gauthier@o-lambret.fr