Total gains of CNAs (see Material and Methods for details) of the tongue Oral Potentially Malignant Lesions (OPMLs) or of OPMLs from all the other anatomical mucosa subsites. The values ranged from 0 (no DNA copy gains) to 41 (one or more gains found in each one of the investigated chromosomal arms). (A) Unstratified data. (B) Data stratified for DNA aneuploidy. The number of samples in each group is shown. Each box represented the median and the first and third quartiles, and the whiskers extended as far as the minimum and maximum values after exclusion of the outliers (values more than 1.5 interquartile ranges below the lower quartile or above the upper quartile). Excluded outliers (with value less than 3 interquartile ranges outside the first and third quartiles) were displayed as circles.