1 - ENT - Head and neck - Salivary gland disease - Benign and Intermediate salivary gland tumours Flashcards
80% of salivary tumours are where? % of these are benign? % of SML tumours benign? % of minor salivary galnd tumours benign? unless what?
- 80% parotid
- 80% benign
- 60% SML tumours benign
- 30%MGT’s benign - unless outside mouth/oropharynx - always malignant)
Benign salivary gland tumours - incidence and aetiology
1 per 10000
unclear, may be related to previous radiation
Benign salivary tumours - sex and pathology
slightly more common in F
arise from reserve stem cells
2 types of benign salivary tumours
pleomorphic adenoma 80%
adenolymphoma - WARTHIN’s tumour
Pleomorphic adenoma - usually where? in who? growth rate?
usually in superficial lobe of parotid
typically middle aged, slow growing
Pleomorphic adenoma - Ix + what may develop and when?
FNA, USS/CT
Adenocarcinoma may develop within 10-15y after
MGMT of pleomorphic adenoma
superficial parotidectomy
surgical excision
radiotherapy
safe to watch and wait if elderly
Adenolymphoma / Warthin’s tumour - originates from? sex? what are they and where? mgmt?
- from parotid lymph nodes - not actually lymphoma
- 8:1 M;F
- soft cystic masses in tail of parotid, may be bilateral
- mgmt partial parotidectomy
two types of intermediate salivary gland tumours
mucoepidermoid tumour
acinic cell
mucoepidermoid tumours - originates from? % occur in parotid? most common demographic? type of tumour? recurrence rate?
o-from interlobular and intralobular ducts
- 90% in parotid
- more common in middle aged women, most common SGT in kids
- cystic
- 30%
mucoepidermoid tumours - low grade vs high grade?
low - slow growing, painless Rx - local resection and follow up
high - grow rapidly, painful, local invasion and meta spread Rx - radial resection + radiotherapy
Acinic cell - from what? % in parotid? characteristics of tumour? mgmt?
from reserve epithelial cells 99% parotid slow growing, solid tumours Mets rare mgmt - local resection
