Pathology of Salivary Gland Tumours

Question 1

Define neoplasia

Answer 1

New abnormal tissue growth

Question 2

What % of parotid tumours are benign?

Answer 2

80%

Question 3

What % of parotid tumours are malignant?

Answer 3

15%

Question 4

What % of minor tumours are malignant?

Answer 4

45%

Question 5

What % of minor tumours are benign?

Answer 5

10%

Question 6

Examples of epithelial neoplasms

Answer 6

Adenoma (benign)
Adenocarcinoma (malignant)

Question 7

Examples of non epithelial neoplasms

Answer 7

Lymphoma
Sarcoma

Question 8

Diagnosis of salivary gland tumours

Answer 8

Core biopsy
Incisional biopsy
FNA

Question 9

Disadvantage of FNA

Answer 9

Not enough to understand pathology + diagnosis
Tells us if malignant or not

Question 10

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

Answer 10

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

Question 11

Histological features of Pleomorphic adenoma

Answer 11

Duct epithelium
Myoepithelial cells
Myxoid + chondroid cells

Question 12

Tx for pleomorphic adenoma

Answer 12

Wide local excision

Question 13

Malignancy rate for pleomorphic adenoma

Answer 13

5% carcinoma risk
Recurrence

Question 14

Histological features of Warthins tumour

Answer 14

• Cystic spaces
• Oncocytic epithelium
• Lymphoid tissue

Question 15

Tx for Warthins tumour

Answer 15

Excision

Question 16

% of Warthins tumour

Answer 16

15

Question 17

% of Pleomorphic adenomas

Answer 17

75%

Question 18

Histological features of adenoid cystic carcinoma

Answer 18

Cribiform architecture
Cystic spaces
Perineural spread

Question 19

% of Adenoid cystic carcinoma

Answer 19

5

Question 20

Histological features of mucoepidermoid carcinoma

Answer 20

Mucous secreting cells
Squamous epithelium
Cystic spaces

Question 21

% of Mucoepidermoid carcinoma

Answer 21

3-5%