1. Clinical staging system.

2007 MF and Sézary syndrome		1979 CTCL		Disease‐specific survival rates in % (Agar 2010)
				5 year	10 year
IA	T1	IA	T1	98	95
	N0		N0
	M0		M0
	B0‐1		‐
IB	T2	IB	T2	89	77
	N0		N0
	M0		M0
	0‐1		‐
IIA	T1‐2	IIA	T1‐2	89	67
	N1‐2		N1
	M0		M0
	B0‐1		‐
IIB	T3	IIB	T3	56	42
	N0‐2		N0,1
	M0		M0
	B0‐1		‐
III	T4	III	T4
	N0‐2		N0,1
	M0		M0
	B0‐1		‐
IIIA	T4			54	45
	N0‐2
	M0
	B0
IIIB	T4			48	45
	N0‐2
	M0
	B1
IVA1	T1‐4	IVA	T1‐4	41	20
	N0‐2
	M0		N2‐3 ‐
	B2
IVA2	T1‐4		M0	23	20
	N3
	M0		‐
	B0‐2
IVB	T1‐4	IVB	T1‐4	18	not reached
	N0‐3		N0‐3
	M1		M1
	B0‐2		‐