title: [On the clinical picture of retroperitoneal tumors].
mesh_terms: D006801:Humans; D008080:Liposarcoma; D008499:Medical Records; D009369:Neoplasms; D009455:Neurofibroma; D012186:Retroperitoneal Neoplasms; D012187:Retroperitoneal Space
keywords: LIPOSARCOMA/case reports; NEUROFIBROMA/case reports; RETROPERITONEAL SPACE/neoplasms