SLS: Paired submucosal, nonfascial-lined spaces of oral cavity between floor of mouth (FOM) mucosa and mylohyoid muscular sling; separated by extrinsic tongue muscles in midline
FOM
Definition is not universally agreed upon and may depend on context
Some authors regard FOM as inferior recess of oral cavity, beneath oral tongue, limited to squamous epithelial mucosa and amenable to visual inspection during routine clinical examination
Some authors regard FOM as region of oral cavity beneath oral tongue and includes mucosa as well as SLS; in many pathologic processes, there is involvement of both mucosa and underlying submucosal contents; in this context, many consider terms "floor of mouth" and "sublingual space" as interchangeable
Finally, some authors regard FOM as mylohyoid muscle itself, in so far as muscle creates boundary between oral cavity and SMS
IMAGING ANATOMY
Overview
Anatomy Relationships
Internal Contents
ANATOMY IMAGING ISSUES
Imaging Recommendations
Imaging Pitfalls
Imaging Issues Related to Malignancy
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References
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Tables
TERMINOLOGY
Abbreviations
Sublingual space (SLS)
Definitions
SLS: Paired submucosal, nonfascial-lined spaces of oral cavity between floor of mouth (FOM) mucosa and mylohyoid muscular sling; separated by extrinsic tongue muscles in midline
FOM
Definition is not universally agreed upon and may depend on context
Some authors regard FOM as inferior recess of oral cavity, beneath oral tongue, limited to squamous epithelial mucosa and amenable to visual inspection during routine clinical examination
Some authors regard FOM as region of oral cavity beneath oral tongue and includes mucosa as well as SLS; in many pathologic processes, there is involvement of both mucosa and underlying submucosal contents; in this context, many consider terms "floor of mouth" and "sublingual space" as interchangeable
Finally, some authors regard FOM as mylohyoid muscle itself, in so far as muscle creates boundary between oral cavity and SMS
IMAGING ANATOMY
Overview
Anatomy Relationships
Internal Contents
ANATOMY IMAGING ISSUES
Imaging Recommendations
Imaging Pitfalls
Imaging Issues Related to Malignancy
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