[The surgery of huge retroperitoneal tumors]

Observations of successfully operated huge retroperitoneal tumors, one of them weighing 14.700 kg, are reported. The advantages for precise diagnosis of modern visualizing techniques--echography and computer tomography--and the inability to establish always an exact cytologic diagnosis by puncture aspiration biopsy are demonstrated. Total extirpation of the tumor with subsequent combined chemo-, radio- and immunotherapy is advised.