Floor of mouth

Last revised by Mostafa Elfeky on 21 Sep 2019

The floor of mouth is an oral cavity subsite and is a common location of oral cavity squamous cell carcinoma

Gross anatomy

The floor of mouth is a U-shaped space which extends (and includes) from the oral cavity mucosa superiorly, and the mylohyoid muscle sling 2,3

  • superiorly: oral mucosal space
  • inferiorly: mylohyoid muscle 3
  • anteriorly: mandibular gingiva
  • posteriorly: anterior tonsillar pillar 2

Related pathology

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