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PPS: Strategic location
Lateral
PS
Medial
PMS
Anterior
MS
Posterior CS
Head and neck lesions
Rare: arise within PPS
Frequent: invade or displace PPS
•
Parotid space
• Pharyngeal mucosal space
• Masticator Space
• Carotid Space
Parotid space
Mass
Parotid space (PS)
Contents
Parotid gland
–
superficial / deep lobe
–
intra / peri-parotid lymph nodes
Facial nerve (VII)
Vessels
–
retromandibular vein (lateral)
–
external carotid artery (medial)
PS
Mass
Pleomorphic adenoma
Pharyngeal mucosal space (PMS)
Contents
Mucosa
(SCCa !)
–
Lymphoid tissue
–
Minor salivary glands
Pharyngobasilar fascia