title: [Abdominal polyarteritis nodosa: angiographic features].
abstract: OBJECTIVE
  Polyarteritis nodosa (PAN) is a systemic vasculitis of small and medium size arteries. The purpose of this study is to evaluate imaging findings, especially angiographic features, of 17 patients with abdominal involvement from polyarteritis nodosa.
  
  
  METHODS
  We reviewed the medical records and imaging findings of 17 patients with PAN involving the abdomen. All patients underwent digital subtraction angiography of the renal or visceral arteries completed by a post-angiographic KUB. Abdominal CT scan was available in three patients. All patients underwent muscle biopsy. A surgical biopsy of the gallbladder was obtained in one patient.
  
  
  RESULTS
  Multiple small aneurysms involving small and medium sized arteries were detected at angiography in 12 patients. CT showed a renal subcapsular hematoma in two patients and acute pancreatitis in one patient.
  
  
  CONCLUSIONS
  Involvement of gastrointestinal and renal arteries is frequent in polyarteritis nodosa. The diagnosis of PAN should be considered when multiple small-sized aneurysms are present at angiography even if biopsy is negative.
authors.affiliation: Service d'imagerie Médicale, Tunisie. najla.mnif@rns.tn
authors.forename: N
authors.initials: N
authors.lastname: Mnif
authors.forename: M
authors.initials: M
authors.lastname: Chaker
authors.forename: S
authors.initials: S
authors.lastname: Oueslati
authors.forename: Th
authors.initials: T
authors.lastname: Ellouze
authors.forename: F
authors.initials: F
authors.lastname: Tenzakhti
authors.forename: S
authors.initials: S
authors.lastname: Turki
authors.forename: N
authors.initials: N
authors.lastname: Ben Abdallah
authors.forename: H
authors.initials: H
authors.lastname: Ben Maïz
authors.forename: R
authors.initials: R
authors.lastname: Hamza
mesh_terms: D000005:Abdomen / Q000098:blood supply; D015746:Abdominal Pain / Q000209:etiology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000783:Aneurysm / Q000000981:diagnostic imaging* / Q000209:etiology; D015901:Angiography, Digital Subtraction / Q000379:methods* / Q000592:standards; D001706:Biopsy / Q000592:standards; D005260:Female; D005334:Fever / Q000209:etiology; D006801:Humans; D006973:Hypertension / Q000209:etiology; D007674:Kidney Diseases / Q000209:etiology; D008297:Male; D017538:Mesenteric Artery, Superior / Q000000981:diagnostic imaging*; D008875:Middle Aged; D018579:Patient Selection; D010488:Polyarteritis Nodosa / Q000150:complications*; D012077:Renal Artery / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000592:standards; D014567:Urography / Q000592:standards; D015431:Weight Loss