Extranodal spread of primary and secondary metastatic nodes: The dominant risk factor of survival in patients with head and neck squamous cell carcinoma

• Misa Sumi,

  Roles Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – review & editing

  Affiliation Department of Radiology and Cancer Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

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• Shuntaro Sato,

  Roles Formal analysis, Validation

  Affiliation Clinical Research Center, Nagasaki University Hospital, Nagasaki, Japan

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• Takashi Nakamura

  Roles Conceptualization, Investigation, Project administration, Supervision, Writing – original draft, Writing – review & editing

  * E-mail: taku@nagasaki-u.ac.jp

  Affiliation Department of Radiology and Cancer Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

  http://orcid.org/0000-0002-1284-0520

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