Аннотация:Although soft tissue sarcomas (STS) belong to a group of rare diseases of mesenchymal origin, their characteristic tendency to recurrence and high mortality necessitates the search for some prognostic bio-markers to identify patients at risk of their recurrence [1]. In this regard, the system of insulinlike growth factors (IGF) and their binding proteins (IGFBP) is of interest, since it has been established that dysregulation of the IGF system leads to the proliferation of cancer cells, migration and resistance to chemotherapy.