These include the introduction of telomere length as a prognosis marker in Ewig sarcoma [27], the association of telomere length of peripheral blood leukocytes with increased risk for soft tissue sarcoma [28], telomere length in complex and simple karyotype sarcomas [29], assessment of ALT in sarcoma [30,31,32,33,34], mosaicism of telomere maintenance mechanisms in sarcomas [35,36] and the frequency of TERT promoter mutations in sarcomas [13,37,38,39]. This evidence concerns the gene TERT and sarcoma.