Table 1. Patient data, including age at diagnosis, gender and TNM stage.

Age at diagnosis, years	Number	Male/female ratio	T1	T2	T3	T4	N0	N+	M0	M1
⩽40	16 14.7%	7/9 1 : 1.3	2	10	2	2	12	4	16	0	16
41–65	38 34.9%	26/12 2.2 : 1	14	11	9	4	27	11	37	1	38
>65	55 50.4%	21/34 1 : 1.6	15	19	8	13	41	14	54	1	55
	109		31	40	19	19	80	29	107	2	109

Abbreviations: M=distant metastasis; N=nodal metastasis; T=tumour size.