Table 1.

Experimental evidence of aneuploidy in early tumours.(The table shows the percentage of early colorectal adenomas (size 1–3 mm, total number 32) with allelic imbalance in five different chromosome arms. Ninety per cent of the adenomas have allelic imbalance in any one of the five chromosome arms. Data from Shih et al. (2001).)

chromosome arm	adenomas with allelic imbalance (%)
1p	10
5q	55
8p	19
15q	28
18q	28
any of these 5	90