title: Management of primary iliopsoas abscess in an immunocompetent patient followed by streptococcal toxic shock syndrome: A case report.
abstract: OBJECTIVE
  Clinical diagnosis of iliopsoas abscess can be challenging, as this pathology often presents without obvious focal findings. Iliopsoas abscess should thus be a differential diagnosis for patients presenting with fever of unknown origin.
  
  
  METHODS
  A 62-year-old healthy Japanese man showed primary iliopsoas abscess of Klebsiella pneumoniae complicated by shock after a complete course of treatment for streptococcal toxic shock syndrome. Successful treatment was achieved with culture-driven antibiotic selection and delayed drainage.
  
  
  RESULTS
  This case demonstrates the importance of identifying the causative microorganisms in iliopsoas abscess to guide therapy. The standard treatments for iliopsoas abscess are antibiotics and drainage of the abscess. Management of this case included successful antibiotic use along with delayed drainage.
  
  
  CONCLUSIONS
  This case report advances the knowledge on the etiology of iliopsoas abscess and sheds light on the need for scientific development of a treatment strategy.
authors.affiliation: Department of General Medicine, National Defense Medical College, Tokorozawa, Japan.
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Hirooka
authors.affiliation: Department of General Medicine, National Defense Medical College, Tokorozawa, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Edo
authors.affiliation: Department of General Medicine, National Defense Medical College, Tokorozawa, Japan.
authors.forename: Hisanori
authors.initials: H
authors.lastname: Danbara
authors.affiliation: Department of General Medicine, National Defense Medical College, Tokorozawa, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Nishimura
authors.affiliation: Department of General Medicine, National Defense Medical College, Tokorozawa, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Obuchi
authors.affiliation: Department of General Medicine, National Defense Medical College, Tokorozawa, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Tanaka
keywords: Abscess drainage; causative microorganisms; iliopsoas abscess; streptococcal toxic shock syndrome