Table 1.

Comparison UICC and ENSAT staging systems for ACC.

Stage	UICC/WHO 2004	ENSAT 2008
I	T1, N0, M0	T1, N0, M0
II	T2, N0, M0	T2, N0, M0
III	T1-2, N1, M0	T1-2, N1, M0
	T3, N0, M0	T3-4, N0-1, M0
	T1–4, N0-1, M1	T1–4, N0-1, M1
IV	T3, N1, M0
	T4, N0-1, M0

T1: tumor ≤ 5 cm; T2: tumor > 5 cm; T3: tumor infiltration in surrounding tissue; T4: tumor infiltration in adjacent organs [ENSAT additionally the presence of a tumor thrombus in the Vena Cava or Vena Renalis]; N0: absence of positive lymph nodes; N1: presence of positive lymph nodes; M0: absence of distant metastases; M1: presence of distant metastasis.