Week 5 - Parotid swellings I (Lecture on powerpoint)

Parotid anatomy
Lies between ramus of mandible, mastoid process, and styloid process
Superficial + deep lobe
Facial n, retromandibular v, ext carotid
Sensory – auriculotemporal n, great auricular n.
Secretomotor – auriculotemporal n. (IX) fibres hitchhike

Parotid gland
Predominantly serous
Stensen duct

Imaging
U/S
sialogram

Infection
Acute parotitis (virus or staph)
Chronic sialoadenitis
Calculi

Neoplasms
Epithelial
Nonepithelial

Epithelial
Adenomas
Mucoepidermoid tumour
Acinic cell tumours
Carcinoma

Parotid neoplasms
75% of salivary neoplasms arise in parotid
In parotid 80% benign
80% of these pleomorphic adenomas

Adenomas
Pleomorphic adenoma
Monomorphic adenoma
- Adenolymphoma
- Oxyphilic adenoma (rare)
- Other types (rare)