title: [Retroperitoneal tumors. Retroperitoneal myxoid liposarcoma. Report of a new case].
abstract: OBJECTIVE
  To describe an additional case of a large retroperitoneal liposarcoma.
  
  
  RESULTS
  A case of a large retroperitoneal liposarcoma in a young male is presented. Treatment was by surgery. The clinical and pathological features, diagnosis, course and treatment of this lesion are discussed.
  
  
  CONCLUSIONS
  Retroperitoneal tumors constitute a heterogeneous group of uncommon neoplasms of unknown etiology. Liposarcoma is the most frequent lesion in this group. It is usually asymptomatic and is often identified by the presence of a large abdominal mass. It is considered to be a peculiar lesion because of its biological and morphological features and course.
authors.affiliation: Servicio de Cirugía General, Hospital de Guipuzcoa, San Sebastián, España.
authors.forename: P
authors.initials: P
authors.lastname: Azpiazu Arnaiz
authors.forename: I
authors.initials: I
authors.lastname: Muro Bidaurre
authors.forename: A
authors.initials: A
authors.lastname: De Frutos Gamero
authors.forename: E
authors.initials: E
authors.lastname: Castro Esnal
authors.forename: A
authors.initials: A
authors.lastname: Martín López
authors.forename: J I
authors.initials: JI
authors.lastname: Asensio Gallego
authors.forename: J R
authors.initials: JR
authors.lastname: Ribera Garbayo
mesh_terms: D000293:Adolescent; D006801:Humans; D018208:Liposarcoma, Myxoid / Q000175:diagnosis*; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*