Table 2 Average number of alterations in aCGH cases
Tumor TypeGainsLossesAmplificationsDeletionsTotal Number of Alterations
Pilocytic astrocytoma2.6 (0–9)2.7 (0–11)00.1 (0–1)5.4 (0–20)
Diffuse astrocytoma4.7 (0–11)5.8 (2–12)0.2 (0–1)0.1 (0–1)10.8 (4–22)
Anaplastic astrocytoma8.0 (1–12)10.1 (3–21)0018.1 (11–33)
Glioblastoma14.0 (0–90)17.4 (2–61)1.5 (0–10)0.9 (0–4)33.8 (7–164)
  • Values expressed as average (minimum–maximum) in each case. aCGH, array comparative genomic hybridization.