title: In search of the unknown primary.
authors.forename: M P
authors.initials: MP
authors.lastname: Yardley
authors.forename: P D
authors.initials: PD
authors.lastname: Bull
mesh_terms: D001707:Biopsy, Needle; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D009333:Neck; D009382:Neoplasms, Unknown Primary / Q000473:pathology*