title: [Arterial embolization in hemorrhagic renal angiomyolipoma].
abstract: OBJECTIVE
  Renal angiomyolipoma (AML) is a rare benign tumour (2-3%) comprising variable proportions of an adipose component, which is often the most abundant, a smooth muscle contingent and a vascular contingent. The objective of this study is to demonstrate the value of embolization of bleeding angiomyolipomas.
  
  
  METHODS
  2 patient, aged 22 and 62 years, presented with perirenal haematoma secondary to bleeding angiomyolipoma and were treated by selective arterial embolization.
  
  
  RESULTS
  In one case, partial nephrectomy was subsequently performed because of the size of the angiomyolipoma (10 cm). In the other case, attempted partial nephrectomy at 3 months failed due to the proximity of the renal hilum and nephrectomy was performed.
  
  
  CONCLUSIONS
  Beyond a diameter of 4 cm, the risk of perirenal haemorrhage is proportional to the size of the tumour. When surgery is required, selective arterial embolization is the first stage of treatment allowing partial nephrectomy in the majority of cases.
authors.affiliation: Service d'Urologie, Hôpital Pontchaillou, Rennes, France. s_moudouni@yahoo.fr
authors.forename: S M
authors.initials: SM
authors.lastname: Moudouni
authors.forename: I
authors.initials: I
authors.lastname: En-Nia
authors.forename: J J
authors.initials: JJ
authors.lastname: Patard
authors.forename: B
authors.initials: B
authors.lastname: Lobel
authors.forename: F
authors.initials: F
authors.lastname: Guillé
mesh_terms: D000328:Adult; D018207:Angiomyolipoma / Q000150:complications*; D004621:Embolization, Therapeutic; D005260:Female; D006470:Hemorrhage / Q000209:etiology* / Q000628:therapy*; D006801:Humans; D007674:Kidney Diseases / Q000209:etiology* / Q000628:therapy*; D007680:Kidney Neoplasms / Q000150:complications*; D008875:Middle Aged