title: Bilateral spontaneous retroperitoneal bleeding in a patient on nimesulide: a case report.
abstract: BACKGROUND
  Spontaneous retroperitoneal bleeding is a rare but potentially life-threatening event of varied etiology. Herein we report a case of bilateral non-traumatic retroperitoneal hemorrhage.
  
  
  METHODS
  A 50-year-old Greek man, who was on a non-steroidal anti-inflammatory agent (nimesulide) for ankylosing spondylitis, presented with a right retroperitoneal hematoma combined with contralateral subcapsular renal hematoma. Bleeding on his right side was successfully controlled by arterial embolization with coils, whereas the left renal hematoma was treated conservatively. His recovery period was uneventful.
  
  
  CONCLUSIONS
  This is the first reported case of bilateral retroperitoneal bleeding in a patient receiving nimesulide for ankylosing spondylitis. The application of minimally invasive techniques resulted in the desired positive outcome with preservation of both renal units.
authors.affiliation: 2nd Department of Urology, University of Athens, School of Medicine, Athens, Greece. imitsog@med.uoa.gr.
authors.forename: Iraklis C
authors.initials: IC
authors.lastname: Mitsogiannis
authors.forename: Eleftherios
authors.initials: E
authors.lastname: Chatzidarellis
authors.forename: Andreas
authors.initials: A
authors.lastname: Skolarikos
authors.forename: Athanasios
authors.initials: A
authors.lastname: Papatsoris
authors.forename: Georgia
authors.initials: G
authors.lastname: Anagnostopoulou
authors.forename: Evangelos
authors.initials: E
authors.lastname: Karagiotis