[On neoplasms of the retroperitoneal space with perirenal localization].
D005354:Fibrosarcoma; D006801:Humans; D007680:Kidney Neoplasms; D008499:Medical Records; D009369:Neoplasms; D012187:Retroperitoneal Space
FIBROSARCOMA/case reports; KIDNEY/neoplasms; RETROPERITONEAL SPACE/neoplasms