“…An increased risk of STS has been found in survivors of various types of childhood cancers, including retinoblastoma, leukaemia, Wilms' tumour, and Hodgkin's lymphoma (Breslow et al, 1995;Beaty et al, 1995;Moll et al, 1997;Neglia et al, 2001;Bisogno et al, 2004;Fletcher et al, 2004;Kleinerman et al, 2005). Also survivors of childhood STS, osteosarcoma, and Ewing sarcoma have been shown to be at increased risk of multiple primary malignancies, including bone sarcomas and STS (Heyn et al, 1993;Pratt et al, 1997;Neglia et al, 2001;Paulussen et al, 2001;Bacci et al, 2005;Cohen et al, 2005;Bassal et al, 2006). Development of multiple primary malignancies may also represent a side effect of chemotherapy or radiotherapy, which yield an increased risk of secondary malignancies, including STS (Brady et al, 1992;Kony et al, 1997;Neglia et al, 2001;Sheppard and Libshitz, 2001;Cormier and Pollock, 2004;Kirova et al, 2005;Thijssens et al, 2005;Virtanen et al, 2006).…”