Table 2

Primary sphere formation assay

Tumor typePrimary sphere (clonogenic) frequency
Medulloblastoma (n = 3)13.8%, 14.8%, 25.1%
Pilocytic astrocytoma (n = 3)0.3%, 1.3%, 1.5%
Glioblastoma (n = 1)11.4%
Anaplastic ependymoma8%