title: Head and neck cancer with an occult primary tumor.
authors.forename: C D
authors.initials: CD
authors.lastname: Jacobs
authors.forename: H A
authors.initials: HA
authors.lastname: Pinto
mesh_terms: D001707:Biopsy, Needle; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis*; D016679:Genome, Viral; D006258:Head and Neck Neoplasms / Q000175:diagnosis*; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000302:isolation & purification*; D006801:Humans; D009382:Neoplasms, Unknown Primary / Q000175:diagnosis*; D016133:Polymerase Chain Reaction