Table 1.

T category and nodal status of the primary tumours involved in this study

	Nodal status
T category	Unknown	Node negative	Node positive	Total
Unknown	3	1	2	6
T1	5	11	13	29
T2	1	9	22	32
T3	1	1	1	3
T4	0	1	7	8
Total	10	23	45	78