“…In clinical practice, a dexamethasone dose ranging from 10 to 14 mg/m 2 is usually used [2,15,28]. In regard to the safety of corticosteroids, it has to be considered that corticosteroid treatment, especially in children older than 10 years, increases the risk of aseptic osteonecrosis [6,20,28]. Furthermore, laboratory studies suggest steroids may interfere with response to chemotherapy in osterosarcoma cell lines, but this has not been shown in vivo [9].…”