Table III. TNM staging classification.

Stage	Sites	T	Size	N	M
1	Orbit, head and neck region (excluding parameningeal sites), or the non-bladder and/or non-prostate genito-urinary region	T1 or T2	a or b	N0 or N1 or Nx	M0
2	Bladder/Prostate, extremity, cranial parameningeal, other	T1 or T2	a	N0 or Nx	M0
3	Bladder/Prostate, extremity, cranial parameningeal, other	T1 or T2	a b	N1 N0 or N1 or Nx	M0 M0
4	All	T1 or T2	a or b	N0 or N1	M1

T1: Confined to anatomic site of origin: a) < 5 cm in diameter; b) > 5 cm in diameter; T2: extension and/or fixative to surrounding tissue: a) < 5 cm in diameter; b) > 5 cm in diameter; N0: lymph nodes not involved; N1: lymph nodes involved; Nx: unknown; M0: no distant metastasis; M1: metastasis present.