BACKGROUND/AIMS: Differential diagnosis of RCTB; Ewing sarcoma, small cell osteosarcoma, mesenchymal chondrosarcoma, osteoblastoma, chondroblastom, primary bone lymphoma and multiple myeloma is still challenging. Given the significant differences in treatment, accurate diagnosis is imperative. This study aimed to evaluate some histochemical and immunohistochemical criteria of RCTB. SUBJECTS AND METHODS: PAS, CD99, CD138, osteocalcin, and LCA were evaluated in 113 cases of ... Read more