Anatomy

The parotid is the largest salivary gland, located between the ramus of mandible and mastoid tip. It has an asymmetric dumbbell shape with larger superficial lobe separated from a smaller deep lobe by the facial nerve. The gland is encapsulated by the parotid-masseteric fascia. The deep lobe is adjacent to the styloid process and the carotid sheath but can extend into the parapharyngeal space/lateral pharyngeal space. The facial nerve reliably originates from the stylomastoid foramen and is reliably 1 cm inferior and 1cm deep to the tragal cartilage. The parotid gland is innervated by the auriculotemporal nerve relay from CN IX. Stenson's duct drains parotid secretions into the oral cavity near upper 2nd molar.

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