[Complex diagnostics of osteosarcomas].

It was analyzed the examination results of 156 patients with osteosarcoma. The data show that definition of histogenetic source, diagnostics and prognosis of treatment results are possible and expedient in case of analysis of signs reflecting tumor cells specificity. These signs may be determined by using of clinical parameters, X-ray imaging and light microscopy in case of moderately and highly differentiated sarcomas.

[The immunogistochemical aspects of the angiogenesis by Ewing's sarcoma].

Results of observation were analyzed in 68 patients with Ewing's sarcoma. Reagents made by DAKO (France) such as CD-31, endothelial cell, clone JC 70A, isotype: Lg GI, kappa 02/1 ml were used in the study. It was estimated, that CD31 expression activity in endothelial elements was inversely proportional and reliably correlated with malignant process by the Ewing's sarcoma.