Buccal space, retromaxillary fat pad Superficial layer, deep cervical fascia Middle layer, deep cervical fascia Retropharyngeal space Perivertebral space, prevertebral component Deep layer, deep cervical fascia Perivertebral space, paraspinal component Masticator space Pharyngeal mucosal space/surface Parapharyngeal space Parotid space Carotid space Axial graphic depicts the spaces of the suprahyoid neck. Surrounding the paired fat-filled parapharyngeal spaces (PPS) are the 4 critical paired spaces of this region, the pharyngeal mucosal (PMS), masticator (MS), parotid (PS), and carotid spaces (CS). Retropharyngeal (RPS) and perivertebral spaces (PVS) are the midline nonpaired spaces. A PMS mass pushes the PPS laterally, an MS mass pushes the PPS posteriorly, a PS mass pushes the PPS medially, and a CS mass pushes the PPS anteriorly. Lateral RPS mass pushes PPS anteriorly without lifting styloid process. The superficial (yellow line), middle (pink line), & deep (turquoise line) layers of deep cervical fascia outline the spaces.
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