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Related to submental space: submandibular space, sublingual space
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The boundaries of the submental space are formed by the hyoid bone inferiorly, the mandible superiorly, and the anterior bellies of the digastric muscles bilaterally (figure).
Involvement of the submental space by inflammatory, neoplastic, or congenital lesions of the head and neck is relatively uncommon compared with the prevalence of such lesions in other cervical zones.
The first was a case of cervical necrotizing fasciitis involving the submental space, and the second began as a case of cellulitis of the soft palate that evolved into pyogenic anterior mediastinitis.