title: Spontaneous iliopsoas muscle hematoma in a patient with von Willebrand disease: a case report.
abstract: BACKGROUND
  Iliopsoas hemorrhage is a serious complication of bleeding disorders that occurs most commonly in patients with hemophilia and less commonly in patients with von Willebrand disease. It causes severe pain, muscle dysfunction and occasionally femoral nerve palsy. We describe the case of a patient with von Willebrand disease type 3 with a large iliopsoas hematoma who was treated with a von Willebrand factor concentrate (Humate-P).
  
  
  METHODS
  A 20-year-old Iranian man was referred to our emergency ward because of the gradual onset of right flank pain. He was known to have been diagnosed with von Willebrand disease type 3 at age two years old. Magnetic resonance imaging showed a mass in the right iliopsoas muscle. The diagnosis of iliopsoas hemorrhage and partial femoral nerve palsy was established, and he responded to medical treatment.
  
  
  CONCLUSIONS
  We report a case of von Willebrand disease type 3 with spontaneous iliopsoas hematoma associated with femoral nerve palsy that was well managed with Humate-P treatment.
authors: Department of Thalassemia & Hemoglobinopathy Research Center, Ahvaz Jundishapur University of Medical Science, Shafa Hospital (Golestan Area), Ahvaz 61357-33119, Iran. keikhaeib@yahoo.com.
authors: Bijan
authors: B
authors: Keikhaei
authors: Ahmad
authors: A
authors: Soltani Shirazi