title: [Retroperitoneal tumors].
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D005350:Fibroma / Q000473:pathology*; D005354:Fibrosarcoma / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009455:Neurofibroma / Q000473:pathology*; D012186:Retroperitoneal Neoplasms / Q000473:pathology*; D012509:Sarcoma / Q000473:pathology*
vernacular_title: Guzy zaotrzewnowe.