title: Invited commentary.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University Medical Center Göttingen, Germany, Robert-Koch-Str. 40, 37077 Göttingen, Germany. bdanner@med.uni-goettingen.de
authors.forename: Bernhard C
authors.initials: BC
authors.lastname: Danner
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000235:genetics* / Q000556:secondary; D016172:DNA Fingerprinting; D003937:Diagnosis, Differential; D006258:Head and Neck Neoplasms / Q000473:pathology; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000235:genetics* / Q000556:secondary; D009154:Mutation; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis