Ca Oral Cavity

Question 1

T1

Answer 1

tumor less than or equal to 2 cm with depth of invasion less than or equal to 5mm

Question 2

T2

Answer 2

tumor less than or equal to 2 cm with DOI greater than 5mm or tumor greater than 2cm and less than or equal to 4cm with DOI less than or equal to 10 mm

Question 3

T3

Answer 3

tumor greater than 2cm and less than or equal to 4 cm with DOI greater than 10 mm or tumor greater than 4 cm with DOI less than or equal to 10 mm

Question 4

T4

Answer 4

moderately advanced or very advanced local disease

Question 5

T4a

Answer 5

moderately advanced local disease. tumor greater than 4 cm with DOI greater than 10 mm or tumor invades adjacent structures only (through cortical bone of the mandible or maxillae or involves the maxillary sinus or skin of the face).

Question 6

T4b

Answer 6

very advanced local disease. tumor invades masticator space, pterygoid plates or skull base and or encases the internal carotid artery

Question 7

stage grouping: N1

Answer 7

stage III

Question 8

stage grouping N2, T1,2,3 4a

Answer 8

IVA

Question 9

stage grouping T4b

Answer 9

IVB