title: [A 50-year-old male with AIDS and retroperitoneal mass].
authors.affiliation: Fundació de la Lluita contra la Sida, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, España.
authors.forename: Eugènia
authors.initials: E
authors.lastname: Negredo
authors.forename: Màrius
authors.initials: M
authors.lastname: Pagés
authors.forename: José
authors.initials: J
authors.lastname: Ramírez
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000209:etiology* / Q000473:pathology*; D012514:Sarcoma, Kaposi / Q000209:etiology* / Q000473:pathology*