Outcomes of Adolescent and Adult Patients with Lung Metastatic Osteosarcoma and Comparison of Synchronous and Metachronous Lung Metastatic Groups. oleh Ayse Gok Durnali, Fatma Paksoy Turkoz, Fisun Ardic Yukruk, Saadet Tokluoglu, Omer Kamil Yazici, Ayse Demirci, Oznur Bal, Selay Gundogdu Buyukbas, Onur Esbah, Berna Oksuzoglu, Necati Alkis