Recognition of Rhabdo- and Leiomyosarcomas by Means of in-111 Labeled Antimyosin-Antibody Fragments — An Improvement for the Oncologic Diagnostic

10 patients suffering from myosarcomas have been studied with In-111 labeled antimyosin Fabs in our department until now. At all times the diagnosis was ascertained by histological examination of the primary tumor. All myosarcomas, ie rhabdomyosarcomas as well as leiomyosarcomas, and different histologically and histochemically identified subgroups were also detected by antimyosin radioimmunoscintigraphy except for one case of recurrent leiomyosarcoma. In some cases the tumors could be delineated more clearly than by means of MRT or other anatomical methods.