Development of Chondroblastic Variant of Osteosarcoma After Root Channel Treatment in the Base of Maxillary Sinus - Balsak, Serdar; Çelik, Fatma Yabul; Atasoy, Bahar; Yurtsever, Ismail; Yozgat, Can Yilmaz; Akcay, Ahmet; Yuzkan, Sabahattin; Alkan, Alpay (Klinische Pädiatrie, 2024)