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Table 2 Most Common Chromosomal Copy Number Aberration Among 71 Medulloblastomas.

From: Medulloblastoma outcome is adversely associated with overexpression of EEF1D, RPL30, and RPS20 on the long arm of chromosome 8

Chromosome Loss

Number (%)

p value, log-rank [OS: PFS]

17p loss

36 (50%)*

0.544: 0.816

17p loss and 17q gain (consistent with isochromosome 17q)

23 (32%)*

0.704: 0.874

16q loss

29 (40%)

0.707: 0.889

10q loss

25 (35%)

0.356: 0.252

8p loss

24 (34%)

0.581: 0.423

16p loss

22 (31%)

0.744: 0.736

6q loss

16 (22%)

0.741: 0.345

10p loss

16 (22%)

0.325: 0.386

9q loss

16 (22%)

0.999: 0.703

11p loss

15 (21%)

0.201: 0.212

19p loss

13 (18%)

0.332: 0.282

3q loss

13 (18%)

0.899: 0.439

6p loss

13 (18%)

0.506: 0.095

11q loss

13 (18%)

0.330: 0.375

13q loss

10 (14%)

0.966: 0.611

17q loss

10 (14%)

0.918: 0.889

15q loss

8 (11%)

0.064: 0.596

1p loss

8 (11%)

0.061: 0.167

20q loss

8 (11%)

0.992: 0.780

X loss

8 (11%)

0.958: 0.613

3p loss

7 (10%)

0.476: 0.343

21q loss

7 (10%)

0.397: 0.573

Chromosome Gain

Number (%)

p value, log-rank [OS: PFS]

17q gain

34 (48%)*

0.794: 0.340

17q gain and 17p loss (consistent with isochromosome 17q)

23 (32%)*

0.704: 0.874

7q gain

21 (30%)

0.927: 0.366

2p gain

16 (22%)

0.394: 0.526

7p gain

16 (22%)

0.394: 0.195

18q gain

11 (15%)

0.896: 0.842

X gain

10 (14%)

0.786: 0.868

2q gain

10 (14%)

0.166: 0.356

17p gain

9 (13%)

0.545: 0.885

5p gain

9 (13%)

0.863: 0.688

18p gain

9 (13%)

0.963: 0.652

1q gain

8 (11%)

0.242: 0.088

9p gain

8 (11%)

0.913: 0.893

19 gain

8 (11%)

0.480: 0.403

8q gain

7 (10%)

0.0141**: 0.0004**

3q gain

7 (10%)

0.212: 0.464

5q gain

7 (10%)

0.657: 0.790

6q gain

7 (10%)

0.551: 0.990

  1. * In 23 cases, 17q gain was detected with concurrent 17p loss, and was consistent with i17q.
  2. ** Statistically significant differences by log-rank testing.