Table 2.

BRAF and RAS mutations in different TBSRTC categories [N = 80]

TBSRTC	No. of	No mutation	Mutation	BRAF	NRAS	HRAS	KRAS
Category*	Cases	detected	detected
Cat 3	18	9	9 (50%)	1	6	1	1
Cat 4	9	3	6 (66.7%)	0	3	3	0
Cat 5	16	9	7 (43.75%)	3	4	0	0
Cat 6	27	10	17 (66.7%)	12	5	0	0
Nodal metastases	10	4	6 (55.6%)	5	1	0	0
Total	80	35	45 (56.25%)	21	19	4	1
				(46.7%)	(42.2%)	(8.9%)	(2.2%)

*cases with technically noncontributory results excluded