repeated aggressive surgical interventions combined with chemo-and radiotherapy , particularly in malignant mesenchymal primary retroperitoneal tumours with an average of 5.8 years ( 10 cases ) , show a distinct improvement in survival rates , while the same procedure in 3 malignant neurogenic and teratoid primary retroperitoneal tumours resulted in an insignificant average prolongation of life of 8.3 months since the first operation for malignant growth .
C0184661
procedure
C0543467
operation