Table 3.

Staging categorization.

bvFTD-stage	At baseline (N = 62)	At follow-up (N = 49)
1	10	4
2	24*	23*
3	9	8
4	7	7
not stageable	12	7
∑	62	49

^*At baseline and at follow-up, 8 out of 24 bvFTD patients already showed involvement of the optic radiation.