title: [Primary psoas abscess due to Streptococcus pneumoniae].
abstract: OBJECTIVE
  To report to the literature a new case of primary psoas abscess.
  
  
  METHODS
  The patient is a 65 years old woman who suffered back and left hip pain for approximately 1 month. A CTA showed a retroperitoneal mass that involved the left Psoas. It was drained 1800 cc of purulent fluid infected by Streptococo pneumoniae.
  
  
  RESULTS
  In a CTA made 21 days after drainage, showed a very small residual collection.
  
  
  CONCLUSIONS
  Primary Psoas Abscess are a very rare entity, with a low rate of mortatility if well treated.
authors.affiliation: Servicio de Urología 1, Hospital Universitario Central de Asturias, Oviedo, Asturias. malvarez79@mixmail.com
authors.forename: M
authors.initials: M
authors.lastname: Alvarez Múgica
authors.forename: A
authors.initials: A
authors.lastname: Jalón Monzón
authors.forename: R C
authors.initials: RC
authors.lastname: González Alvarez
authors.forename: S
authors.initials: S
authors.lastname: Escaf Barmadah
authors.forename: J L
authors.initials: JL
authors.lastname: Martín Benito
authors.forename: J
authors.initials: J
authors.lastname: Regadera Sejas
mesh_terms: D000368:Aged; D004322:Drainage; D005260:Female; D006801:Humans; D011008:Pneumococcal Infections / Q000000981:diagnostic imaging / Q000628:therapy; D016659:Psoas Abscess / Q000000981:diagnostic imaging / Q000628:therapy; D014057:Tomography, X-Ray Computed