Cancers of unknown primary site: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up.

K. Fizazi1, F. A. Greco2, N. Pavlidis3, G. Daugaard4, K. Oien5 & G. Pentheroudakis3, on behalf of the ESMO Guidelines Committee* Department of Cancer Medicine, Institut Gustave Roussy, University of Paris Sud, Villejuif, France; Tennessee Oncology, Centennial Medical Center, Nashville, USA; Department of Medical Oncology, University of Ioannina, Ioannina, Greece; Department of Oncology 5073, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark; University of Glasgow, Institute of Cancer Sciences, Glasgow, UK