Oral Cavity

Question 1

What is the most common area affected within the oral cavity?

Answer 1

Anterior 2/3 tongue

Most —> least common
Ant tongue —> FOM —> buccal mucosa —> retromolar trigone —> hard palate —> gingavae

Question 2

Describe T1 stage

Answer 2

<= 2cm with DOI <= 5mm

Question 3

Describe T2

Answer 3

<= 2cm with DOI >5mm and <=10mm

Or

2-4cm with DOI <=10mm

Question 4

Describe T3

Answer 4

Any size (<4cm) with DOI >10mm

Or

> 4cm with DOI <=10mm

Question 5

Describe T4

Answer 5

T4a >4cm with DOI >10mm
Or invading adjacent structures

T4b. Invades masticator space, pterygoid plates or skull base. +- encasing internal carotid artery

Question 6

Describe Stage 1 (what TNM)

Answer 6

T1N0M0

5y OS ~78%

Question 7

Describe stage II (TNM)

Answer 7

T2N0M0

5y OS ~58%

Question 8

Describe stage III (TNM)

Answer 8

T3N0M0

Or T1-3 N1M0

5y OS ~44%

Question 9

Describe stage IV

Answer 9

IVa T4a N0-1 M0. Or
T1-4 N2M0

IVb. T4b Nany M0
Or anyT N3 M0

Question 10

What is the risk of LN involvement if FOM or tongue SCC primary?

Answer 10

25-45%

Elective neck treatment should be offered for all oral cavity tumours

Question 11

What is the treatment of choice for early stage tumours? (Stage I & II)?

Answer 11

Surgery as a single modality
Aim for 1cm margins (vital structure permitting)

Close margins (<5mm) mean further surgery or PORT is indicated