The CD15+/CD24+ population was significantly increased in the medulloblastoma model (P7: 23.25+/-1.59%; P17: 45.38+/-3.12%, p = 0.022) while the CD15-/CD24- population was significantly decreased (P7:28.4+/-3.68%; P17:10.78+/-1.78%, p = 0.011) (Fig 4A and 4B). The gene discussed is CD24; the disease is medulloblastoma.