[Prostaglandins of series E in morphologic variants of osteogenic sarcoma and evaluation of the degree of therapeutic pathomorphism of the tumor].

The content of prostaglandins E (PGE) is studied in osteogenic sarcomas from 191 patients. The level of PGE after a neo-adjuvant therapy of osteogenic sarcoma depends upon the individual susceptibility to the drug. Inverse correlation is found between the PGE content in the tumor and the degree of therapeutic pathomorphosis when adriamycin and methotrexate are used before the operation. Single transfusion of the allogenic bone-marrow suspension results in a considerable decrease of the PGE level in the osteogenic sarcoma. Possible mechanisms of action of different therapeutical methods on the PGE level as well as use of the drugs influencing arachidonic acid metabolism in the tumor are discussed.