SMAD4 and cancer: Three of the putative recurrent homozygous deletions contain a known cancer-related gene; 8p22-21.3 (17.9 to 22.0 Mb; PCM1), 8p21.2 (23.0 to 27.1 Mb; TNFRS10A) and 18q21.1-21.2 (46.8 to 52.8 Mb; MADH4) (cancer gene list queried from [15]).