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
Cytokeratin 19 mRNA cells
CNS relapses (n = 40)
P value
n
Percentage
Positive (n = 78)
26
33.3
0.004
Negative (n = 414)
14
3.4