Pathology of Salivary Gland Tumours

Question 1

What % of parotid tumours are malignant?

Answer 1

15%

Question 2

What % of minor salivary tumours are malignant?

Answer 2

45%

Question 3

Diagnosis of salivary gland tumours

Answer 3

FNA - indicates malignancy not diagnosis
Incisional biopsy
Core biopsy

Question 4

Disadvantage of FNA

Answer 4

Indicates malignancy not diagnosis

Question 5

Name salivary gland tumours in order of most common to least (4)

Answer 5

• Pleomorphic adenoma
• Warthins tumour
• Adenoid cystic carcinoma
• Mucoepidermoid carcinoma

Question 6

Histological features of Pleomorphic adenoma

Answer 6

Duct epithelium
Myoepithelial cells
Myxoid + chondroid cells

Question 7

% of Pleomorphic Adenomas

Answer 7

75%

Question 8

Malignancy rate for pleomorphic adenoma

Answer 8

5% carcinoma risk
Recurrence

Question 9

Histological features of Warthins tumour

Answer 9

• Cystic spaces
• Oncocytic epithelium
• Lymphoid tissue

Question 10

% of Warthins tumour

Answer 10

15

Question 11

Histological features of adenoid cystic carcinoma

Answer 11

Cribiform architecture
Cystic spaces
Perineural spread

Question 12

% of Adenoid cystic carcinoma

Answer 12

5

Question 13

Histological features of mucoepidermoid carcinoma

Answer 13

Mucous secreting cells
Epithelium (squamous)
Cystic spaces

Question 14

% of Mucoepidermoid carcinoma

Answer 14

3-5%