Roentgenologic follow-up in primarily conservatively treated osteogenic sarcoma

Conclusions

Comparing the roentgenologically estimated involution of a primarily conservatively treated osteosarcoma with the histologic regression grading, the coincidence is 72%. When including grades I to III in one group and IV to VI in an other, the accuracy of roentgenologic evaluation rises to 88%. Based on a typical roentgenologic follow-up of tumors, that react well to the medical treatment, criteria were determined to allow an estimation of the degree each osteosarcoma responds to the therapy. Difficulties still remain with some tumors, especially where no control angiography was done. Computerized tomography and nuclearmedical techniques will probably provide additional diagnostic help in these and other cases.