[Cytodiagnosis of bone tumors]

Fine needle biopsy was performed in 48 patients suffering from X-ray detected osteolytic lesions, during two years. A representative sample was obtained in 38 of them (79.2 percent). Cytologic conclusions could be proved in 35 patients by histology or clinical finding of primary tumour (in cases with bone secondaries). Cytologic diagnosis was correct in 30 patients (87.7 per cent). Especially good results were found out in bone metastases, plasmacytomas, and Ewing's sarcomas. Fine needle biopsy is to be recommended as an integral part of complex diagnosis of bone tumours.