From: Central nervous system relapse in patients with breast cancer is associated with advanced stages, with the presence of circulating occult tumor cells and with the HER2/neu status
CNS relapses (n = 40)
P value
Group A (n = 32)
Group B (n = 8)
Stage I/stage II
6 (15%)
3 (7.5%)
0.367
Stage IIIb/stage IV
26 (65%)
5 (12.5%)
0.143
All stages
32 (80%)
8 (20%)
0.048