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Percentage of rats developing tumors three months after intracranial implant
| Neurospheres | Serum monolayers | |||
|---|---|---|---|---|
| 2 – 4 × 105 cells | 4 × 104 cells | 4 × 105 cells | 4 × 104 cells | |
| GS1 | 100% (11/11) | 100% (4/4) | 100% (8/8) | 100% (4/4) |
| GBM2 | 100% (4/4) | 100% (4/4) | 0% (0/4) | ND |
| GBM3 | 100% (3/3) | 100% (6/6) | ND * | ND * |
Dissociated tumor cells did not grow well in serum containing medium after passage 2
