title: [Renal angiomyolipoma with arteriovenous fistula causing retroperitoneal hematoma. Case report].
abstract: OBJECTIVE
  To report the case of a female patient with ultrasound diagnosis of great left retroperitoneal hematoma admitted to the hospital for diagnostic workup and treatment.
  
  
  METHODS
  39-year-old patient presenting with intense epigastric pain irradiated to both flanks. Hematuria was not present. CT scan and arteriography led to the diagnosis of angiomyolipoma with arteriovenous fistula and subcapsular hematoma. Selective embolization was carried out.
  
  
  CONCLUSIONS
  Hamartomas account for 3% of kidney tumors in adults; they are composed of 3 mesodermal tissues, including blood vessels. The lack of elastic membrane in their arteries favours aneurysm development.
authors.affiliation: Servicio de Urología, Hospital Río Carrión, Palencia, España. Madriazola@telefonica.net
authors.forename: Miguel
authors.initials: M
authors.lastname: Adriazola
authors.forename: Roberto
authors.initials: R
authors.lastname: Ortiz Cabria
authors.forename: Antonio
authors.initials: A
authors.lastname: Alonso
authors.forename: Emilio
authors.initials: E
authors.lastname: García Cobo
authors.forename: Enrique
authors.initials: E
authors.lastname: Tejeda
authors.forename: Francisco
authors.initials: F
authors.lastname: Romero
mesh_terms: D000328:Adult; D018207:Angiomyolipoma / Q000150:complications*; D001164:Arteriovenous Fistula / Q000150:complications*; D005260:Female; D006406:Hematoma / Q000209:etiology*; D006499:Hepatic Artery; D006503:Hepatic Veins; D006801:Humans; D007680:Kidney Neoplasms / Q000150:complications*; D012187:Retroperitoneal Space