Likewise, copy-number loss of tumour suppressor regions was detected in skin tumours but not the marrow, including CDKN2A/chromosome 9p (loss of 9p harbouring the tumor suppressor CDKN2A) in 3 out of 5 patients (patients 1, 7 and 10), SETD2/chromosome 3p in 3 out of 5 patients (patients 1, 9 and 10) and TP53/chromosome 17p in 1 out of 5 patients (patient 1; Fig. 1e (bottom)). This evidence concerns the gene CDKN2A and skin neoplasm.