<p>The most frequently deleted genes in our samples were <i>EPHB6, EXOC4 (SEC8L1), GNAS, MLL3 and TBX22</i>. The most frequently amplified genes were <i>HAPLN1, ADAM29, SMAD2 and SMAD4</i>. Gene names are according to the official HUGO Gene Nomenclature Committee and the old names in parentheses are from Sjöblom et al.</p