title: Site-wise Differences in Adequacy of the Surgical resection Margins in Head and Neck Cancers.
abstract: Adequacy of surgical resection decided by the margin status is important in attaining a good local control and better survival in Head and neck Cancers. Conventionally, a measured distance between the tumor edge and the cut edge of the specimen is taken as the margin. A margin more than 5  millimeter (mm) is considered clear, less than 5 mm is close and less than one mm is denoted as involved. The concept of this adequacy varies between the different sites and subsites in head and neck. The purpose of this paper is to review the current evidence that describes the adequacy of surgical margin status and their variability among the sites and sub-sites in the head and neck.
authors.affiliation: Department of Head and Neck Surgery and Oncology, Amrita Institute of Medical Sciences, Amrita University, Kochi, Kerala India.
authors.forename: Sivakumar
authors.initials: S
authors.lastname: Vidhyadharan
authors.affiliation: Department of Head and Neck Surgery and Oncology, Amrita Institute of Medical Sciences, Amrita University, Kochi, Kerala India.
authors.forename: Indhu
authors.initials: I
authors.lastname: Augustine
authors.affiliation: Department of Head and Neck Surgery and Oncology, Amrita Institute of Medical Sciences, Amrita University, Kochi, Kerala India.
authors.forename: Akshay S
authors.initials: AS
authors.lastname: Kudpaje
authors.affiliation: Department of Head and Neck Surgery and Oncology, Amrita Institute of Medical Sciences, Amrita University, Kochi, Kerala India.
authors.forename: Subramania
authors.initials: S
authors.lastname: Iyer
authors.affiliation: Department of Head and Neck Surgery and Oncology, Amrita Institute of Medical Sciences, Amrita University, Kochi, Kerala India.
authors.forename: Krishnakumar
authors.initials: K
authors.lastname: Thankappan
keywords: Head and Neck Cancers; Laryngeal cancer; Oral cancer; Squamous cell carcinoma; Surgical Margins