In two out of 59 children with Hodgkin's disease treated with MVPP regimen combined with local irradiation and followed up over 10 years the secondary neoplasms were detected, i.e. in 3.4% with persisting remission of the underlying disease. Chondrosarcoma was diagnosed in one patient in the field of irradiation (after 13 years). This patient died. In the second patient two different tumors (squamous epithelioma and fibrosarcoma) developed after 7 and 9 years following irradiation of two different areas. Actually, there are not any symptoms in this female patients (working). To decrease the incidence of these serious complications of Hodgkin's disease treatment regimens introduced by the Polish Pediatric Leukemia Study Group since 1988, the use of alkylating agents in limited, and the dose of local irradiation is decreased.