[Results of the treatment of non-rhabdomyosarcomatous soft tissue neoplasms within the scope of the CWS 81 study].

347 children with all types of soft tissue sarcoma (STS) have been entered between 1981 and April 1986 into the CWS-81 study. Excluding 229 patients with rhabdomyosarcoma, 118 patients with other STS were analysed in the histological subgroups, separately. 33 synovial sarcomas (SyS), 15 undifferentiated sarcomas (US) and 13 extrasceletal Ewing's sarcoma (EES) were treated with a multimodale trial including chemotherapy and radiotherapy after initial not-mutilating resection or biopsy only, Relapse-free survival rate by Kaplan-Meier was 66% in SyS, 48% in EES and 38% in US, respectively. Patients treated according to the guidelines of the CWS-protocol showed better prognosis than patients with major protocol violations or patients with recurrence when entered into the trial. In SyS only 2 of the 7 patients with recurrence developed metastases. The tumor response rate within 7-9 weeks chemotherapy exclusively given was 71% in patients with stage III and IV. Non-responding tumors to chemotherapy had bad prognosis, irrespective of histological subtype or further treatment. EES and US developed earlier recurrence and more often metastases than SyS or rhabdomyosarcomas. The administered VACA-chemotherapy seems not to be very effective in EES and US. In all other varieties of STS recurrence at the primary site assumed relatively greater importance. Chemotherapy and radiation were not administered in all patients. Fibrosarcoma (FS) was diagnosed in 13 patients. Six of these were entered in the trial at the time of local recurrence and 4 of these 6 relapsed again locally, one with metastasis concurrently.(ABSTRACT TRUNCATED AT 250 WORDS)